myopenmath.com Question 5 A 0.4211 g sample of standard KHP with a purity factor of 99.50% was titrated with NaOH, requiring 29.87 mL to reach the endpoint. Determine the molarity of NaOH for this titration. The molar mass of KHP is 204.22 g/mol 0.06869 Question 6 Two additional titrations of standard KHP resulted in NaOH concentrations of 0.07049 M and 0.07059 M. Determine the average molarity of the three NaOH concentrations (the third concentration is your answer to question 5) and find the relative standard deviation of the concentration in parts per thousand. Average - 0.06992 M RSD Question 7 A mass of 0.7643 g of unknown KHP required 33.71 mL to reach the endpoint. What mass of unknown KHP would be required to obtain an end point of 20.00 ml? 0.4535 ppt Question 8 A 1.2297 g sample of impure KHP was dissolved in approximately 50 mL of deionized water before titration with 0.1004 M NaOH. It required 23.21 mL to reach the phenolphthalein endpoint. Calculate the weight percent of KHP in the impure sample. 38.70

myopenmath.com Question 5 A 0.4211 g sample of standard KHP with a purity factor of 99.50% was titrated with NaOH, requiring 29.87 mL to reach the endpoint. Determine the molarity of NaOH for this titration. The molar mass of KHP is 204.22 g/mol 0.06869 Question 6 Two additional titrations of standard KHP resulted in NaOH concentrations of 0.07049 M and 0.07059 M. Determine the average molarity of the three NaOH concentrations (the third concentration is your answer to question 5) and find the relative standard deviation of the concentration in parts per thousand. Average - 0.06992 M RSD Question 7 A mass of 0.7643 g of unknown KHP required 33.71 mL to reach the endpoint. What mass of unknown KHP would be required to obtain an end point of 20.00 ml? 0.4535 ppt Question 8 A 1.2297 g sample of impure KHP was dissolved in approximately 50 mL of deionized water before titration with 0.1004 M NaOH. It required 23.21 mL to reach the phenolphthalein endpoint. Calculate the weight percent of KHP in the impure sample. 38.70

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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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

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