- (a) Suppose you wanted to make a buffer of exactly pH 7.00 using KH,PO, and Na,HPO,. If the final solution was 0.1 M in KH,PO,, what concentration of Na,HPO, would you need? (b) Now assume you wish to make a buffer at the same pH, using the same substances, but want the total phosphate molarity ([HPO,²]+ [H;PO, ]) to equal 0.3. What concentrations of the KH,PO4 and Na;HPO, would be required?

- (a) Suppose you wanted to make a buffer of exactly pH 7.00 using KH,PO, and Na,HPO,. If the final solution was 0.1 M in KH,PO,, what concentration of Na,HPO, would you need? (b) Now assume you wish to make a buffer at the same pH, using the same substances, but want the total phosphate molarity ([HPO,²]+ [H;PO, ]) to equal 0.3. What concentrations of the KH,PO4 and Na;HPO, would be required?

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

- (a) Suppose you wanted to make a buffer of exactly pH 7.00 using
KH,PO, and Na,HPO,. If the final solution was 0.1 M in KH,PO,,
what concentration of Na,HPO, would you need?
(b) Now assume you wish to make a buffer at the same pH, using the
same substances, but want the total phosphate molarity ([HPO,²]+
[H;PO, ]) to equal 0.3. What concentrations of the KH,PO4 and
Na;HPO, would be required?

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