Weak Acid Titration Problem (Post-Equivalence Region)

Q: Calculate the pH when 20.00 mL of 0.025 M sodium hydroxide is added to 40.00 mL of 0.010 M acetic acid.

Step 1: Recognize that an excess amount of a strong monofunctional base is in solution plus hydroxide from acetate protonation.

Hydroxide mass balance plus simplification is below.

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