pls answer number 3 II. Solve the following problems:1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2MNa,SO,?2. A carbonate buffer of pH 10 is needed by a chemist. How many grams ofNa,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.-11of HCO,= 4.7 x 10"3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL ofa buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.124. How many mL of 2.0M boric acid solution must be added to 600mL of a0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

In following 3rd question Na2HPO4 and H2PO4 calculate the weight required to prepare 200ml of buffer…

Answered: pls answer number 3

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Chemistry

pls answer number 3

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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Question

pls answer number 3

II. Solve the following problems:
1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M
Na,SO,?
2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of
Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.
-11
of HCO,
= 4.7 x 10"
3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of
a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12
4. How many mL of 2.0M boric acid solution must be added to 600mL of a
0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

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