1) Determine the moles of KMnO4 required for each trial. 41.43 mL 0.45 mL = 40.98 mL of KMnO4 moles x 43.68 mL-0.39 mL = 43.29 mL of KMnO4 moles x 0.1000 M solution 1000 mL 0.1000 M solution 1000 mL 0.1000 M solution 1000 mL 46.79 mL 0.43 mL = 46.36 mL of KMnO4 moles x- = 0.004098 moles of KMnO4 Moles KMnO4 in Trial 1 0.004098 M = 0.004329 moles of KMnO4 Moles KMnO4 in Trial 2 0.004329 M = 0.004636 moles of KMnO4 Moles KMnO4 in Trial 3 0.004636 M 2) Calculate the moles of H₂O2 present in the sample for each trial. Use Equation editor here to show all your work! You can copy and paste these when you need more lines Moles H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines Moles H₂O₂ in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines Page 2 of 4 Moles H₂O₂ in Trial 3 Put your answer here with units! 3) How many grams of H₂O2 must have been present for each trial? Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 3 Put your answer here with units! 4) Determine the percent by mass H₂O2 for each trial. Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O2 in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O₂ in Trial 3 Put your answer here with units!

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
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I need help with questions 1-4? Also if I'm wrong on question 1 can you do it again? If not you can continue with questions 2-4?

1) Determine the moles of KMnO4 required for each trial.
41.43 mL - 0.45 mL = 40.98 mL of KMnO4 moles x
43.68 mL - 0.39 mL = 43.29 mL of KMnO4 moles x-
46.79 mL 0.43 mL = 46.36 mL of KMnO4 moles x
0.1000 M solution
1000 mL
0.1000 M solution
1000 mL
0.1000 M solution
1000 mL
= 0.004098 moles of KMnO4
Moles KMnO4 in Trial 1
0.004098 M
= 0.004329 moles of KMnO4
=
Moles KMnO4 in Trial 2
0.004329 M
0.004636 moles of KMnO4
Moles KMnO4 in Trial 3
0.004636 M
2) Calculate the moles of H₂O2 present in the sample for each trial.
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
Moles H₂O₂ in Trial 1
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
Moles H₂O₂ in Trial 2
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
Page 2 of 4
Moles H₂O₂ in Trial 3
Put your answer here with units!
3) How many grams of H₂O2 must have been present for each trial?
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
g H₂O₂ in Trial 1
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
g H₂O₂ in Trial 2
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
g H₂O₂ in Trial 3
Put your answer here with units!
4) Determine the percent by mass H₂O2 for each trial.
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% by mass H₂O₂ in Trial 1
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
% by mass H₂O2 in Trial 2
Put your answer here with units!
Use Equation editor here to show all your work! You can copy and paste these when you need more lines
% by mass H₂O2 in Trial 3
Put your answer here with units!
Transcribed Image Text:1) Determine the moles of KMnO4 required for each trial. 41.43 mL - 0.45 mL = 40.98 mL of KMnO4 moles x 43.68 mL - 0.39 mL = 43.29 mL of KMnO4 moles x- 46.79 mL 0.43 mL = 46.36 mL of KMnO4 moles x 0.1000 M solution 1000 mL 0.1000 M solution 1000 mL 0.1000 M solution 1000 mL = 0.004098 moles of KMnO4 Moles KMnO4 in Trial 1 0.004098 M = 0.004329 moles of KMnO4 = Moles KMnO4 in Trial 2 0.004329 M 0.004636 moles of KMnO4 Moles KMnO4 in Trial 3 0.004636 M 2) Calculate the moles of H₂O2 present in the sample for each trial. Use Equation editor here to show all your work! You can copy and paste these when you need more lines Moles H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines Moles H₂O₂ in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines Page 2 of 4 Moles H₂O₂ in Trial 3 Put your answer here with units! 3) How many grams of H₂O2 must have been present for each trial? Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines g H₂O₂ in Trial 3 Put your answer here with units! 4) Determine the percent by mass H₂O2 for each trial. Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O₂ in Trial 1 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O2 in Trial 2 Put your answer here with units! Use Equation editor here to show all your work! You can copy and paste these when you need more lines % by mass H₂O2 in Trial 3 Put your answer here with units!
DATA SUMMARY TABLES
Use the table provided to fill in the measured values and observations obtained during the lab.
Molarity of standard KMnO4 solution:
Mass of empty flask (g)
Mass of flask with sample (g)
Initial buret level
Final buret level
Qualitative comments
Trial 1
125.250 g
135.068 g
0.45 mL
41.43 mL
Light pink
Trial 2
125.825 g
135.201 g
0.39 mL
43.68 mL
0.1000 M
Over-titrated/pink
Trial 3
126.195
137.192
0.43 mL
46.79
Light pink
Transcribed Image Text:DATA SUMMARY TABLES Use the table provided to fill in the measured values and observations obtained during the lab. Molarity of standard KMnO4 solution: Mass of empty flask (g) Mass of flask with sample (g) Initial buret level Final buret level Qualitative comments Trial 1 125.250 g 135.068 g 0.45 mL 41.43 mL Light pink Trial 2 125.825 g 135.201 g 0.39 mL 43.68 mL 0.1000 M Over-titrated/pink Trial 3 126.195 137.192 0.43 mL 46.79 Light pink
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