Calculate the ratio: [𝐶𝐻3𝐶𝑂𝑂𝐻] / [𝐶𝐻3𝐶𝑂𝑂𝑁𝑎]

Question

That will give a solution with pH of 5.00, given 𝐾𝑎 = 1.8 × 10−5 .

Answer 1

The Henderson-Hasselbalch equation is
pH = pKa + log (base/acid)
pH is 5.00
Convert Ka to pKa. That will be close to 4.75 but you need to do that yourself/
Solve for base/acid concentrations. Base is CH3COONa and acid is CH3COOH
Post your work if you get stuck.