Weak Acid Titration Problem (Pre-Equivalence Region)

Q: Calculate the pH when 10.00 mL of 0.025 M sodium hydroxide is added to 40.00 mL of 0.010 M acetic acid.

Step 1: Recognize this is an acid-base reaction between a weak monoprotic acid and a strong monofunctional base.

So the number of millimoles of base added to this weak acid solution fully reacts with an equivalent number of millimoles of acid.

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