can someone help come up with a solution to this biochem problem?

Question

You are the substitute teacher for a high school biology lab and you need 5.00 L of 0.20 M acetate buffer, pH 4.50. You discover that the buffer available in the lab is actually pH 5.0. Since you do not have time to make up fresh buffer, you will need to adjust the pH using acid. How many milliliters of 6.00 M HCl do you need to add to the 5.00 L of 0.20 M buffer to adjust the pH from 4.50 to 5.00?

Hint: determine (HA) and (A-) at pH 5.00 and then at pH 4.50 and then calculate how much HCl is needed to react with A- to create more HA and less A-.

if anyone one has any idea with what formulas i can use to come up with this answer please let me know. i can't find any examples of a problem like this in my text book so i'm confused on how to figure out this problem and am not sure of what formula to use. thank you so much for your help

Answer 1

You'll use the Henderson-Haselbalch equation for this problem.

The hint tells you what you need to do.

Answer 2

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