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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Expert Solution
Step 1
Given Data:
A 50 ml. sample of HNO2 having concentration =0.200 M
This HNO2 titrated with the KOH having concentration = 0.400 M
Ka for HNO2 =4.6 x 10-4
pH of the solution after addition of 25 ml. of KOH = ?
Step 2
50 ml of 0.200 M of HNO2 titrated with the 25 ml of 0.400 M of KOH.
The reaction between the HNO2 and the KOH titration gives KNO2.
Number of mmol of HNO2 = 50 ml x 0.200 M = 10 mmol
Number of mmole of KOH = 25 ml x 0.400 M = 10 mmol
That is complete neutralisation takes place and the mixture contains 10 mmol of KNO2 in 75 ml of the solution.
So the moles of KNO2 :
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