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Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of MnO4 are required? 9.860 x 10-5 moles 0.01486 moles 1.635 x 10-6 moles 3.944 x 10-1 moles 3.944 x 104 moles QUESTION 7 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of Fe2+ are present in this sample? [Hint: Use your answer to Question 6!] Ⓒ1.972 x 10-3 moles 4.935 x 104 moles 3.944 x 10-3 moles 1.972 moles 0.0817 moles QUESTION 8 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many grams of iron are present in the sample? Enter the number of grams in the space provided. Do not write any units! [Hint: Use your answer to Question 7! The molar mass of Fe is 55.845 g/mol] QUESTION 9 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. What is the percentage of iron in the unknown sample? Enter the percentage of iron in the space provided. Include 4 significant figures in your answer. Do not write any units! [Hint: Use your answer to Question 8!

Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of MnO4 are required? 9.860 x 10-5 moles 0.01486 moles 1.635 x 10-6 moles 3.944 x 10-1 moles 3.944 x 104 moles QUESTION 7 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of Fe2+ are present in this sample? [Hint: Use your answer to Question 6!] Ⓒ1.972 x 10-3 moles 4.935 x 104 moles 3.944 x 10-3 moles 1.972 moles 0.0817 moles QUESTION 8 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many grams of iron are present in the sample? Enter the number of grams in the space provided. Do not write any units! [Hint: Use your answer to Question 7! The molar mass of Fe is 55.845 g/mol] QUESTION 9 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. What is the percentage of iron in the unknown sample? Enter the percentage of iron in the space provided. Include 4 significant figures in your answer. Do not write any units! [Hint: Use your answer to Question 8!

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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QUESTION 6 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of MnO4 are required? 9.860 x 10-5 moles 0.01486 moles 1.635 x 10-6 moles 3.944 x 10-1 moles 3.944 x 10-4 moles QUESTION 7 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of Fe2+ are present in this sample? [Hint: Use your answer to Question 61] 1.972 x 10-3 moles 4.935 x 10-4 moles 944 x 10-3 moles 1.972 moles 0.0817 moles QUESTION 8 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many grams of iron are present in the sample? Enter the number of grams in the space provided. Do not write any units! [Hint: Use your answer to Question 7! The molar mass of Fe is 55.845 g/mol] QUESTION 9 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. What is the percentage of iron in the unknown sample? Enter the percentage of iron in the space provided. Include 4 significant figures in your answer. Do not write any units! [Hint: Use your answer to Question 8! QUESTION 10 What is the percentage of Fe in iron(II) ammonium sulfate hexahydrate, Fe(NH 4) 2(SO 4) 2 6 H 20? Remember to account for the 6 waters of hydration when you calculate the molar mass of this compound!
Transcribed Image Text:QUESTION 6 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of MnO4 are required? 9.860 x 10-5 moles 0.01486 moles 1.635 x 10-6 moles 3.944 x 10-1 moles 3.944 x 10-4 moles QUESTION 7 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of Fe2+ are present in this sample? [Hint: Use your answer to Question 61] 1.972 x 10-3 moles 4.935 x 10-4 moles 944 x 10-3 moles 1.972 moles 0.0817 moles QUESTION 8 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many grams of iron are present in the sample? Enter the number of grams in the space provided. Do not write any units! [Hint: Use your answer to Question 7! The molar mass of Fe is 55.845 g/mol] QUESTION 9 Questions 6 through 9 refer to the following situation: A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. What is the percentage of iron in the unknown sample? Enter the percentage of iron in the space provided. Include 4 significant figures in your answer. Do not write any units! [Hint: Use your answer to Question 8! QUESTION 10 What is the percentage of Fe in iron(II) ammonium sulfate hexahydrate, Fe(NH 4) 2(SO 4) 2 6 H 20? Remember to account for the 6 waters of hydration when you calculate the molar mass of this compound!
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