KHP(aq) + NaOH(aq) -> H2O (l) + KNaP(aq) 1. Once the equivalence point is reached, any NaOH that is added after that reacts with the indicator giving the pink color. If too much NaOH is added the pink color is too dark. How would this affect the value of the calculated NaOH molarity?   2. Why might it be a good idea to rinse down the sides of the flask with a squirt of deionized water from time to time during the titration?   3. When a little NaOH is added to the KPH solution, why is a pink color initially seen, but then it disappears?

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.58QE
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KHP(aq) + NaOH(aq) -> H2O (l) + KNaP(aq)

1. Once the equivalence point is reached, any NaOH that is added after that reacts with the indicator giving the pink color.

If too much NaOH is added the pink color is too dark. How would this affect the value of the calculated NaOH molarity?

 

2. Why might it be a good idea to rinse down the sides of the flask with a squirt of deionized water from time to time during the titration?

 

3. When a little NaOH is added to the KPH solution, why is a pink color initially seen, but then it disappears?

 

 

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