Question

Write a procedure so a lab mate could prepare 100 mL of buffer solution of that...

Write a procedure so a lab mate could prepare 100 mL of buffer solution of that pH from two solids. Your procedure should clearly indentify which glassware and chemicals you will use to prepare the solution. Assume that you will use the sodium salt of the conjugate base to prepare the solution. Our desired pH is 7.5 and the weak acid I chose is Sodium hydrogen sulfite with pKa of 7.21.

Use Henderson-Hasselbalch equation to determine molequantities of the weak acid and its conjugate base that you will need to prepare the solution.

Calculate the masses of the weak acids and its conjugate base needed to get the correct pH.

Write a 5-8 step detailed procedure that explains how to actually prepare the buffer solution.

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Homework Answers

Answer #1

The conjugate base of hydrogen sulphite is sulphate.

Now, using the Henderson-Hasselbach equation, we can calculate the acid/base ratio:

If you choose sodium hydrogen sulphite and sodium sulphate.

  

The mass ratio is:

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