In a titration of HNO₃, you add a few drops of phenol-phthalein indicator to 50.00 mL of acid in a flask. You quickly add 20.00 mL of 0.0502 M NaOH but overshoot the end point,and the solution turns deep pink. Instead of starting over, youadd 30.00 mL of the acid, and the solution turns colorless. Then,it takes 3.22 mL of the NaOH to reach the end point. (a) What isthe concentration of the HNO₃ solution? (b) How many moles of NaOH were in excess after the first addition?
In a titration of HNO₃, you add a few drops of phenol-phthalein indicator to 50.00 mL of acid in a flask. You quickly add 20.00 mL of 0.0502 M NaOH but overshoot the end point,and the solution turns deep pink. Instead of starting over, youadd 30.00 mL of the acid, and the solution turns colorless. Then,it takes 3.22 mL of the NaOH to reach the end point. (a) What isthe concentration of the HNO₃ solution? (b) How many moles of NaOH were in excess after the first addition?
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter4: Stoichiometry Of Chemical Reactions
Section: Chapter Questions
Problem 82E: Potatoes can be peeled commercially by soaking them in a 3-M to 6-M solution of sodium hydroxide,...
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In a titration of HNO₃, you add a few drops of phenol-phthalein indicator to 50.00 mL of acid in a flask. You quickly add 20.00 mL of 0.0502 M NaOH but overshoot the end point,and the solution turns deep pink. Instead of starting over, youadd 30.00 mL of the acid, and the solution turns colorless. Then,it takes 3.22 mL of the NaOH to reach the end point. (a) What isthe concentration of the HNO₃ solution? (b) How many moles of NaOH were in excess after the first addition?
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