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essayref Question Completion Status: QUESTION 3 Look at the Table of Reaction Mixtures at Room Temperature in the Lab Manual. Why do those solutions contain KNO3 and (NH4)2SO4? This is a case where reading the lab thoroughly could be most helpful. They are used in an effort to maintain the ionic strength of the solutions. The presence of these compounds is important to ensure the starch will turn blue-black in the presence of the iodine. The addition of those components speeds the reaction so that we can acquire the data in one two-hour lab period. The peroxydisulfate ion is unstable if the KNO3 and (NH4)2SO4 are not present. QUESTION 4 An important part of being able to do this experiment is the ability to handle dilution calculations. If a solution of concentration M1 and volume V1 is diluted to a new volume V2, the new molarity may be found by: M1V1=M2V2 Notice in this experiment that you are putting several components together to make your starting concentrations and it is essential that you properly calculate the starting concentrations. With reference to the dilution formula, it doesn't matter what other components are involved you can focus on individual components. So, for example, if in a reaction mixture you start with 10.0 mL of 0.200 M Kl and it it is mixed with 5.0 mL of 0 005 M NanS203, its new concentration is (10.0 mL x 0.200 M) / 15.0 mL = 0.133 M. Notice 15.0 mL is just the total volume after mixing Now, for the question. What is the molarity of Kl in a solution made by mixing 7.6 mL of 0.243 M KI with 12.5 mL of 0.009 M Na7S203? Do not include units with your answer. Report your answer to three significant figures. Click Save and Submit to saue and submit. Click Save All Answers to save all answers. Clos Save All Answers hp NE

essayref Question Completion Status: QUESTION 3 Look at the Table of Reaction Mixtures at Room Temperature in the Lab Manual. Why do those solutions contain KNO3 and (NH4)2SO4? This is a case where reading the lab thoroughly could be most helpful. They are used in an effort to maintain the ionic strength of the solutions. The presence of these compounds is important to ensure the starch will turn blue-black in the presence of the iodine. The addition of those components speeds the reaction so that we can acquire the data in one two-hour lab period. The peroxydisulfate ion is unstable if the KNO3 and (NH4)2SO4 are not present. QUESTION 4 An important part of being able to do this experiment is the ability to handle dilution calculations. If a solution of concentration M1 and volume V1 is diluted to a new volume V2, the new molarity may be found by: M1V1=M2V2 Notice in this experiment that you are putting several components together to make your starting concentrations and it is essential that you properly calculate the starting concentrations. With reference to the dilution formula, it doesn't matter what other components are involved you can focus on individual components. So, for example, if in a reaction mixture you start with 10.0 mL of 0.200 M Kl and it it is mixed with 5.0 mL of 0 005 M NanS203, its new concentration is (10.0 mL x 0.200 M) / 15.0 mL = 0.133 M. Notice 15.0 mL is just the total volume after mixing Now, for the question. What is the molarity of Kl in a solution made by mixing 7.6 mL of 0.243 M KI with 12.5 mL of 0.009 M Na7S203? Do not include units with your answer. Report your answer to three significant figures. Click Save and Submit to saue and submit. Click Save All Answers to save all answers. Clos Save All Answers hp NE

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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essayref Question Completion Status: QUESTION 3 Look at the Table of Reaction Mixtures at Room Temperature in the Lab Manual. Why do those solutions contain KNO3 and (NH4)2SO4? This is a case where reading the lab thoroughly could be most helpful. They are used in an effort to maintain the ionic strength of the solutions. The presence of these compounds is important to ensure the starch will turn blue-black in the presence of the iodine. The addition of those components speeds the reaction so that we can acquire the data in one two-hour lab period. The peroxydisulfate ion is unstable if the KNO3 and (NH4)2SO4 are not present. QUESTION 4 An important part of being able to do this experiment is the ability to handle dilution calculations. If a solution of concentration M1 and volume V1 is diluted to a new volume V2, the new molarity may be found by: M1V1=M2V2 Notice in this experiment that you are putting several components together to make your starting concentrations and it is essential that you properly calculate the starting concentrations. With reference to the dilution formula, it doesn't matter what other components are involved you can focus on individual components. So, for example, if in a reaction mixture you start with 10.0 mL of 0.200 M Kl and it it is mixed with 5.0 mL of 0 005 M NanS203, its new concentration is (10.0 mL x 0.200 M) / 15.0 mL = 0.133 M. Notice 15.0 mL is just the total volume after mixing Now, for the question. What is the molarity of Kl in a solution made by mixing 7.6 mL of 0.243 M KI with 12.5 mL of 0.009 M Na7S203? Do not include units with your answer. Report your answer to three significant figures. Click Save and Submit to saue and submit. Click Save All Answers to save all answers. Clos Save All Answers hp NE
Transcribed Image Text:essayref Question Completion Status: QUESTION 3 Look at the Table of Reaction Mixtures at Room Temperature in the Lab Manual. Why do those solutions contain KNO3 and (NH4)2SO4? This is a case where reading the lab thoroughly could be most helpful. They are used in an effort to maintain the ionic strength of the solutions. The presence of these compounds is important to ensure the starch will turn blue-black in the presence of the iodine. The addition of those components speeds the reaction so that we can acquire the data in one two-hour lab period. The peroxydisulfate ion is unstable if the KNO3 and (NH4)2SO4 are not present. QUESTION 4 An important part of being able to do this experiment is the ability to handle dilution calculations. If a solution of concentration M1 and volume V1 is diluted to a new volume V2, the new molarity may be found by: M1V1=M2V2 Notice in this experiment that you are putting several components together to make your starting concentrations and it is essential that you properly calculate the starting concentrations. With reference to the dilution formula, it doesn't matter what other components are involved you can focus on individual components. So, for example, if in a reaction mixture you start with 10.0 mL of 0.200 M Kl and it it is mixed with 5.0 mL of 0 005 M NanS203, its new concentration is (10.0 mL x 0.200 M) / 15.0 mL = 0.133 M. Notice 15.0 mL is just the total volume after mixing Now, for the question. What is the molarity of Kl in a solution made by mixing 7.6 mL of 0.243 M KI with 12.5 mL of 0.009 M Na7S203? Do not include units with your answer. Report your answer to three significant figures. Click Save and Submit to saue and submit. Click Save All Answers to save all answers. Clos Save All Answers hp NE
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