Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support, Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 Lesson Observations of Chemical Changes Institution Ocean County College Session 2019L2 CHEM 181 DL1 Course CHEM 181 DL1 Instructor Lea Stage, CHEM 181 DL1 Observations of Chemical Changes. As soon as the flame catches onto the wick, the wax of the candle immediately begins to melt and evaporate through the wick to the flame to keep fueling it and allowing it to keep burning. At least one photograph must show the student's face. Chemistry Lab Report Experiment 2: Properties and Changes of Matter. Describe the similarities and/or differences between heating and burning the magnesium metal. Cover the table on your worksheet with a clear plastic sheet, then follow steps 110 below. Along the way, observations were made pertaining to the reactions witnessed. . Add one drop of iron(II) sulfate to the silvernitrate solution. Explain your answer. Put 2 mL of lead (II) nitrate solution into a small test tube. She helped me in last minute in a very reasonable price. If so, it most likely has sodium bicarbonate in it. Gas Observations. A physical . The balanced chemical reaction : You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The following notes explain the expected observations for each step/reaction: Steps 9 and 10 in the procedure both involve the displacement of a valuable, but less reactive, metal using a less valuable, but more reactive, metal. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Because it is very insoluble it is non-toxic, unlike other, soluble,barium compounds. Final Report. Observations of Chemical Changes. If solid, throw out in trash Abbreviations for (cr), (s), and (aq) (cr) - solid powder Exercise 2: Heating and Combustion. We review their content and use your feedback to keep the quality high. chemical reactions in this lab. Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. 2. Exercise 1. A. Please enable it to continue. The blue colour of the copper(II) sulfate solution fades. Safety- To work with the chemicals used in the lab, it is required to wear safety goggles to protect your eyes from the fumes when working with the chemicals. Hydrochloric acid is a colorless strong corrosive acid.Meanwhile, phenolphthalein is colorless and remains colorless in acidic solutions, but it changes to bright pink in basic solutions.10. It is a lab that will involve observations over a period of 2-4 days. Making careful observations is a critical skill that you will employ throughout the year while doing experiments. 7. Be clear and concise; use only enough detail to communicate your findings. cloudy blue hue, concentrated to the drop area until mixed. When a soda is poured into a glass and the soda change? Synthesis - A reaction where two reactants combine to form 1 product. b Fold decrease in k cat /K M is given relative to wild-type duplex Ala. c G is defined as RTln[(k cat /K M) variant /(k cat /K M) wild-type], where R=1.98272 cal/molK and T=298 K.. Did either heating or burning produce a chemical change? Chemical changes create a new chemical substance, whereas a physical change is a change in appearance or state of matter. Lab Report Assistant. Think about how phenolphthalein acts as an acid/base indicator. Bird Harness Sewing Pattern. 3. temperature change w/o use of heat. The experiment performed in the second part of the lab was heating 4 different chemical substances (s) and observing the changes made to them. 1.9.14 describe the test for Cu, Fe, Fe, Al, Zn and Mg ions in solution using sodium hydroxide solution and ammonia solution; 1.9.15 describe the tests for the following: chloride, bromide and iodide (using silver nitrate solution); The electrochemical series as a series of metals arranged in order of their ability to be oxidised (reactions, other than displacement reactions, not required). The three latter substances were produced in Virginia. Explain your answer. Chemical Reactions Hands-On Labs, Inc. Expert Answer. Read our standard health and safety guidance. 1104 Words; 5 Pages; Open Document. Throughout this experiment, indication that chemical changes are taking place is to be noted. System Observations. The white candles burn faster than blue candles, in our experiment we took two colors of candles white and blue, then burned them until there was no wax left. Explain your answer using your results f rom Data Table 1. Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. Observe physical and chemical . a Values reported are averages of at least three determinations with average standard deviations of 26%. Chemical Reactions. chemical equation - Central Lyon CSD. 1. Final Report. In a chemical change the properties of the new substances are different from the original, the particles are different and the number of particles can change. Chemical Changes Lab Report 948 Words | 4 Pages. Who are the experts? To allow us to visually determine this point, we use compounds called acid-base indicators to tell us when a reaction is complete. Lab 4: Observations of Chemical and Physical Changes Lab Report: Go to the HOL website and read the Explore section for background information. CHEM 181 DL1 Observations of Chemical Changes. 5. Example 1. Online Financial Risk Management Tutors 5. Describe how the observations for this reaction support your answer. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. After this step was completed I combined three different household cleaners with bromthymol blue to observe whether the cleaner was an acid or base. Purpose The purpose of this lab was to measure the temperature of a solution to see how much energy was gained/lose during the reaction between the NiCl2 and Ethylenediamine. Do your observations in well A5 support this or contrast what you would expect to happen? The first explanation resulted that the candle inside the jar took up all the oxygen molecules inside the flask which then lowers the pressure inside and the higher pressure outside the flask is what causes the water to rise up. The third explanation resulted in oxygen inside the flask becoming carbon dioxide which then dissolves in water causing the air pressure to decrease under the glass and the higher pressure outside the flask pushed the water up the flask. 3. Titrations involving a strong acid and a strong base commonly employ phenolphthalein as an indicator. 4. release of energy in form of heat or light. 5. hol observation of chemical changes lab report. The increased demand for the adoption of sustainable practices to protect agroecosystems is challenged by the introduction and dominance of invasive plant species (IPS). Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). CHEM 181 DL1 Observations of Chemical Changes. Examples of such physical properties are: size, shape, color, and state of matter. Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. To associate chemical properties with household products. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). The new mixture was viewed on a light and on a dark . Chemical Changes Lab Partner _____ Data For each reaction, write down your observation(s) before and after the reaction that you believe provide evidence that a chemical change took place. Exercise 2: Heating and Combustion. + Absorb in paper towel and expose to sunlight Observation 2: No color change, bubbling and fizz ing occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. VIII. 4.7. 1. change in color. Using your results from Data Table 1 as a . Chemical changes involve the rearrangement of molecules or atoms and result in the pro-duction of one or more new substances. Student Name Stacia Anderson Student ID 193994 Lesson Observations of Chemical Changes Institution Lord Fairfax Community College Session Fall 2021 Course CHM 101 - Introductory Chemistry I - Lab Instructor Ebrahim Abdurahiman Final Report Exercise 1 1. The second explanation resulted in that the air pressure increases inside the jar because of the heat from the candle, which causes air to come out of the jar and once the candle cools down the pressure decreases and the pressure outside the jar increases which results in pushing the air in and making the water rise up. Please see the HOL Lab Kit link in the Blackboard course or the course syllabus for information on . Procedure: A series of chemical reactions were performed to record observations about chemical changes, physical changes and the difference between the two. Observe physical and chemical changes. Bubbles (of hydrogen) are seen. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula ). How Many Players On Nfl Roster Including Practice Squad, If the substance begins to turn yellow, there is some lead in the tonic. The candles were lit and if the candles increasingly burned then we would take a picture and write the results down. Student Name Stacia Anderson Student ID 193994 Lesson Observations of Chemical Changes Institution Lord Fairfax Community College Session Fall 2021 Course CHM 101 - Introductory Chemistry I - Lab Instructor Ebrahim Abdurahiman Final Report Exercise 1 1. 4. release of energy in form of heat or light. 37 [CoCl4] 2-(alc) + 6 H2O(l) [Co(H2O)6] 2+ (alc) + 4 Cl (alc) Eq 2 The [CoCl4] 2-complex ion produces a brilliant blue color while the [Co(H2O)6] 2+ ion produces a rose- pink color. Title: Observations of Chemical and Physical Changes Experiment Objective: The objective of this experiment is to observe and record chemical and physical changes in substances. Add two drops of sodium hydroxide to the barium nitrate solution. What are the indications of a chemical change, a chemical reaction? . What actually happened was the white candle burned faster. The dependent variables are the things that the scientist observe to see how they respond to the change made to the independent variable. Calculations: None. Question: EXPERIMENT 1: Observations of Chemical Changes. Physical and Chemical Changes For each of the following, record your observations. (When observing a change, your description of that change must include what you observe before the change, during the change, and after the change.) Calculations: None. 1. 2. Get First 2 Pages Of Your Homework Absolutely Free! Phenolphthalein changes from colorless to red at a pH of 8-10. 8. Conclusion The purpose of this lab is to observe and make qualitative and quantitative measurements during a chemical reaction. Chemical Reactions Lab Procedures: Zn and hydrochloric acid. We review their content and use your feedback to keep the quality high. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). 2. evolution of gas. 5 Signs of a Chemical Change. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Chemical change. Fill in this lab report and answer the questions. LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Eye Exercises For Lazy Eye Adults, Describe how your observations for this reaction support your answer., 3. Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. melts (see Figure L2.1). If so, it most likely has sodium bicarbonate in it. Physical education observation report. A deep blue colour of tetra-amminocopper(II) forms. 1. change in color. Describe the similarities and/or differences between heating and burning the magnesium metal. Final Report. Put two drops of copper(II) sulfate solution into box 10. Using your results from Data Table 1 as a . These changes can be divided into 2 classes: physical changes and chemical changes. Physical changes in matter are often reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. At least one photograph must show the student's face. The most common chemical changes are observable through color changes, the formation of Read More Cocl2 Lab Report Lab Report for Experiment #3 Laboratory Techniques and Measurements Student's Name: Date of Experiment: 10/13/2012 Date Report Submitted 10/15/2012 Title: Observations of Chemical Changes Purpose: To learn about the international system of units (SI), to become familiar with common lab equipment and techniques, to gain proficiency in determining volume, mass, length, and temperature of a . In a physical change, matter changes its appearance (physical properties) but not its composition. CHEM 181 DL1 Observations of Chemical Changes. The following notes explain the expected observations for each step/reaction: A dense white precipitate of barium sulfate forms. CHEM 1002 CHEMICAL EQUILIBRIA Laboratory Report NAME: DATE: SECTION: TA: A. Goals/Purpose of Experiment (2 . Labpaq Physical And . If liquid, dump in sink 2. how to verify an unverified sender in outlook. using well plates with chemical filled pipets and by heating and combusting select elements. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Experimental Conclusions Within the activities 1-9, I had saw many different observations that occurred when watching the different solutions mixed. We review their content and use your feedback to keep the quality high. Utilizing the 96-well plate, 2 pipet drops of each chemical were added to the wells in the following combinations: a) NaHCO3+HCl b) HCl+Bromthymol blue c) NH3+1 drop Bromthymol blue d) HCl+blue dye e) Blue dye+NaOCl followed by HCl f) NaOCl+KI followed by various test foods g) KI+Pb(NO3)2 h) NaOH+phenolphthalein i) HCl + phenolphthalein j) NaOH+AgNO3 k) AgNO3+NH3 l) NH3+CuSO4. If so, it most likely has sodium bicarbonate in it. Chemical changes, on the other hand, are not reversible: A log burned in a fire turns to ashes, but . EXPERIMENT 1: Observations of Chemical Changes. Place small samples of each in the appropriate dishes. G1 The reaction . Information about your use of this website will be shared with Google and other third parties. 1. There are five main types of chemical reactions. 5. formation of new substance. PDF. Essay about Lab Observations of Chemical Changes. Textbook: Chemistry 2e, OpenStax, 2019. Place small samples of each in the appropriate dishes. To observe some properties of chemical reactions 2. Disclaimer: Tutors are not employees or representatives of TutorsOnSpot.Com, Join The Community Already Trusted By Thousands Of Students Like You, Online Financial Statement Analysis Tutors, Online Online Capsim Simulation & Rounds Tutors, Online Online Classes | Quizzes | Exams Tutors. A physical . I, 2) Mix only the sodium bicarbonate and red phenol, and observe any changes that occur., b. Dont forget to read the labels on products to find the names or formulas of acids and bases they may contain., 1. Schemes. Magic Crystals . The mass of the can and water was measured to be 112.9789 g. Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. The liquid can only burn in a vaporized or gaseous state, otherwise it would simply just melt. While the distinction between physical and chemical change is a useful one it should be seen as more of a continuum. Initial drop produced dark brown color, upon stirring brown flakes, separated from the solution, producing a clear liquid with dark brown, (2) immediate change in color, concentrated to the highly-, min, turned rusted orange / burnt brown color. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Photosynthesis Lab. From your observations, decide whether it is a chemical change or a physical change. Also determining if a chemical change had occurred. Scientific Communication - record detailed observations using scientific terminology 2. That was the only reaction that caused any type of fizzing or gas, which would be the CO . 1. The following notes explain the expected observations for each step/reaction: A dense white precipitate of barium sulfate forms. After this step was completed I combined three different household cleaners with bromthymol blue to observe whether the cleaner was an acid or base. 4. release of energy in form of heat or light. LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. 9. Data Table 2: Observation of Physical and Chemical Changes. OBJECTIVES 1. Heat slowly to acquire the most accurate results. Observing chemical changes - student sheet, Observing chemical changes - teacher notes, Unit A2 2: Analytical, Transition Metals, Electrochemistry and Organic Nirtrogen Chemistry. Again by observing changes in the color and by monitoring the absorbance of the system resulting from placing a stress on the system we can monitor the equilibrium of the system. IX. Milk going sour. Expert Answer. Add two drops of potassium iodide solution to thedrops of lead nitrate solution. This resource is part of ourMicroscale chemistrycollection, which brings together smaller-scale experiments to engage your students and explore key chemical ideas. Final Report. Explain your answer. At least one photograph must show the student's face. Observations of Reactants : Zinc is in solid state and copper sulfate in aqueous state. Expert Answer. Exercise 1. 4. Chemical Reactions Hands-On Labs, Inc. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. hol observation of chemical changes lab report hol observation of chemical changes lab report. HCI and BIT (Brotherly blue) c. ) NH (ammonia, a base) and 1 drop of BIT d. ) HCI and blue dye e. ) Blue Dye and NAACP (sodium hypochlorite). Personal Reflection I had felt the purpose of the lab was very interesting because it allowed us . (Phenolphthalein) Cloudiness along the bottom of the well. Find the mass of an Alka-Seltzer tablet and a Ziploc bag filled with 20 ml of water (all at the same time). Data Table 2: Observation of Physical and Chemical Changes. In a physical change, one or more physical properties of a substance are altered. The Lab Report Assistant is simply a summary of the experiment's questions, diagrams if needed, and data tables that should be addressed in a formal lab . Exercise 1. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Crystal Smith Gospel Singer, Students investigate the pH level of household substances by testing a variety of common compounds. AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). The reaction was observed and then 1 drop of HCI was . Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. Observe physical and chemical . . If so, it most likely has sodium bicarbonate in it. If your would like a paper copy use ISBN-13 9781593995782. I would assume that the fifth cookie does not have as much starch as the other cookies. See the accompanyingguidance on apparatus and techniques for microscale chemistry, which includes instructions for preparing a variety of solutions. Iron and Sulfur mixture with magnet Only the iron is magnetic; Sulfur is less clumpy. Sodium Chloride and sand mixture. Reactions Observations Before After 1 calcium chloride + By adding 15% of HCl of CaCo3 , made it change chemically, I would tell this by effervescence and observation., I did this lab to find out the differences between chemical and physical changes. Boiling an egg. . brown color, deep wrinkles was the final product. The user-generated content in online communities, which keeps growing, is a valuable source of information for both community users and business industry associated with this type of platforms, as hotel industry [1, 2], where user-generated content, in the form of . Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. burned was observed and recorded. Baking a cake. The reactant was sunlight which caused a chemical change. 3. Used Vexus Dvx 20 For Sale, Answer : Reaction 1 : Add Zinc to Copper Sulfate. Hands on Lab (HOL) Student Lab Kit: Students can order their lab kit directly from HOL using the link provided in Blackboard. For regularly shaped solids, such as a cube, sphere, cylinder, or cone, the volume can be calculated from its measured dimensions (length, width, height, diameter) by using an appropriate equation. . Explain your answer using the observations collected in Data Table 2 OBJECTIVES 1. In simple acid-base titrations a pH indicator may be used, such as phenolphthalein, which becomes pink when a certain pH (about 8.2) is reached or exceeded. OBJECTIVES 1. 3. temperature change w/o use of heat. Using the 96 well plate I combined various chemicals together to observe the chemical changes that were created. Record your observations. This is soluble so nothing is seen at first. Problem Solving - balance chemical equations; Calculations. I would drop some of the hair tonic into some potassium iodide. In this lab, copper (II) chloride, CuCl 2 Chemistry questions and answers. Calculations: None. 7. Did either heating or burning produce a chemical change? Hashima Island Documentary, Physical - change of appearance. Most acid-base solutions are colorless and determining when one reactant has been totally consumed is difficult by simple observations. Add two drops of sodium hydroxide solution tothe iron(II) sulfate solution. When the can is opened the CO2 escaped the liquid causingbubbles. LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Use this practical to investigate how solutions of the halogens inhibit the growth of bacteria and which is most effective, The physics of restoration and conservation, RSC Yusuf Hamied Inspirational Science Programme, How to prepare for the Chemistry Olympiad, guidance on apparatus and techniques for microscale chemistry. Chemical Reactions. Explain your answer. Just wait here to get the offers for your project Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam. Since water and oil do not mix, this mixture had to be continuously stirred and heated . What well did this reaction occur in? drops. If a different indicator such as methyl was used, a different amount of base would have been required to change the color of the solution, offsetting the molarity of the acetic acid with phenolphthalein., Many methods can be used to indicate the endpoint of a reaction; titrations often use visual indicators (the reactant mixture changes color). Barium sulfate is used as a barium meal in medicine since it is opaque to X-rays. Allow the candle to burn for a few minutes noting any changes. The surfaces of the pieces of zinc turn red-brown as copper metal deposits via a displacementreaction. Vinegar is made up to acetic acid, and according to my table, phenolphthalein does not cause acids to turn pink. To observe some properties of chemical reactions. hol observation of chemical changes lab report Navigation Services; Case; Leadership; Contact Before the lab, students should observe the salt crystals under a magnifying glass and draw what they see. Write the chemical equation for the reaction in well A6. Barium hydroxide is alkaline andgradually absorbs carbon dioxide from the air to form the insoluble barium carbonate. To observe some properties of chemical reactions 2. What well did this reaction occur in? Version 42-0145-00-02 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. With water, light energy from the sun, and carbon dioxide from the air, photosynthetic organisms are able to build simple sugars. Jesse Smith Ink Master Portrait, If liquid, dump in sink 2. One test was performed with the substances in the tubes and another with the chemicals outside of the tubes and over the open flame. Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals. Upon mixing, cadet (bright) blue color with small amounts of particles present along. To observe some properties of chemical reactions 2. 3. Each activity had a different kind of their version of either a chemical or physical change when they had different kinds of solutions put together. Expert Answer. Put one drop of silver nitrate solution into box 9. Chemical changes create a new chemical substance, whereas a physical change is a change in appearance or state of matter. 1. Add one drop of potassium thiocyanate solutionto the iron(III) nitrate solution. Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Put one drop of silver nitrate solution into box 9. Observe physical and chemical changes. If so, it most likely has sodium bicarbonate in it. It will have no effect because the phenolphthalein only changes color depending on the pH level. How do physical changes differ from chemical changes? It melts at 41.2C and exhibits the smectic A and the nematic phases at higher temperatures. Teaching notes and expected observations. Properties and Changes of Matter Introduction Matter can either be classified as a pure substance or mixture by its competition, as physical or chemical properties, or physical or chemical change. Lab Report Chemistry Dot Point. A glittering of metallic silver forms as the iron(III) reduces the silver nitrate. Conclusion The purpose of this lab is to observe and make qualitative and quantitative measurements during a chemical reaction. The products will always be water and a salt. Provide balanced chemical equations for each of the chemical reactions that you performed. How might you interpret this result? Chemical changes create a new chemical substance, whereas a physical change is a change, Procedure: A series of chemical reactions were performed to record observations about chemical, changes, physical changes and the difference between the two. Barium sulfate is used as a barium meal inmedicine since it is opaque to X-rays. Predict whether the mass will change after the reaction is completed. 2. Stronger odor (vinegar) with liquid consistency. Gas Observations. Examples of physical changes include changes of state (between solid, liquid, and gas phases) and making mixtures. Student Name Stacia Anderson Student ID 193994 Lesson Observations of Chemical Changes Institution Lord Fairfax Community College Session Fall 2021 Course CHM 101 - Introductory Chemistry I - Lab Instructor Ebrahim Abdurahiman Final Report Exercise 1 1. From this result, can you assume this sample is indeed vinegar or contains some vinegar? hol observation of chemical changes lab report 08 Jun. Use your observations in Data Table 1 to describe a posit ive result f or this test. (2006, January 19). 5 Signs of a Chemical Change 1. change in color 2. evolution of gas 3. temperature change w/o use of heat 4. release of energy in form of heat or light 5. formation of new substance Proper way to Dispose of Excess Reagents 1. The deep purple colour of the potassium manganate(VII) gradually fades first to the brownmanganese(IV) dioxide and then to the pale pink manganese(II) ion (Mn. Also determining if a chemical change had occurred. That gas causes the bubbles and fizzing. This reaction occurred in A1 I believe. Identified any odor that is readily apparent by wafted the fumes toward your nose. In this lab, copper (II) chloride, CuCl 2 Making careful observations is a critical skill that you will employ throughout the year while doing experiments. Exercise 1: Observations of a Chemical Change Data Table 1. Observations of Chemical Change Scribd. Use a flowchart to provide the evidence for the presence of the identified cations. The first experiment is Preparation of a Cobalt Amine Bromide Product ; Synthesis #3 was used to create the compound.
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