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You want to make 100 mL of 0.20 M Acetic Acid buffer with pH=4.0 You are...

You want to make 100 mL of 0.20 M Acetic Acid buffer with pH=4.0 You are given a stock solution of 1.0 M acetic acid and a bottle of sodium acetate salt (MW= 82 g/mol). The formula for the dissociation of acetic acid is shown here (CH3COOH <--> CH3COO- + H+) The henderson hasselbach equation is : pH=pKa +log [A-]/[HA].

What is the ratio of [A-]/[HA] when your buffer pH is 4.0?
Determine the concentration of weak acid and conjugate base in the buffer.
How many mLs of 1.0 M Acetic Acid will you need?
How many grams of sodium acetate salt will you need?
if you now add 1mL of 1M NaOH to your buffer, what would be the resulting pH?

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