Q1: You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benz

Question

Q1: You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate.

How much of each solution should be mixed to prepare this buffer?

Q2:

Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).

Calculate the change in pH when 5.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

Would really like a breakdown of how to do the problems

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Q1: You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benz

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