0.3174 g sample of an unknown acid requires 26.23 mL of 0.1056 M NaOH for neutralization to a phenolphthalein end point. There are 0.27 mL of 0.1096 M HCl used for back-titration. a. How many moles of OH− are used? How many moles of H+ from HCl? b. How many moles of H+ are there in the solid acid? c. What is the molar mass of the unknown acid?
0.3174 g sample of an unknown acid requires 26.23 mL of 0.1056 M NaOH for neutralization to a phenolphthalein end point. There are 0.27 mL of 0.1096 M HCl used for back-titration. a. How many moles of OH− are used? How many moles of H+ from HCl? b. How many moles of H+ are there in the solid acid? c. What is the molar mass of the unknown acid?
Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter24: The Standardization Of A Basic Solution And The Determination Of The Molar Mass Of An Acid
Section: Chapter Questions
Problem 3ASA: A 0.3012g sample of an unknown monoprotic acid requires 24.13mL of 0.0944MNaOH for neutralization to...
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0.3174 g sample of an unknown acid requires 26.23 mL of 0.1056 M NaOH for neutralization to a phenolphthalein end point. There are 0.27 mL of 0.1096 M HCl used for back-titration.
a. How many moles of OH− are used? How many moles of H+ from HCl?
b. How many moles of H+ are there in the solid acid?
c. What is the molar mass of the unknown acid?
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