2015, Question 3 · Long answer · 10 points · about 23 minutes

Titrating a potassium sorbate solution

Calculate concentration and sketch a titration curve while analyzing indicator choice and weak acid equilibrium.

1 Read the question

The question is College Board's, from the 2015 exam. It starts on page 9 of the PDF. College Board no longer posts this exam, so it opens from the copy of College Board's PDF that the Internet Archive saved on November 11, 2025.

Open Question 3 (PDF, page 9)

2 Write your answer

Answer each part the way you would on the exam, in full sentences, with your work shown. Your writing saves as you type.

3 Score it

Score your answer against College Board's scoring guidelines, one point at a time. Give yourself a point only when your answer says what the guideline asks for.

Scoring guidelines (PDF, page 7) What the exam readers saw (Student Performance Q&A)

Question, scoring guidelines and Chief Reader report: College Board, from the Internet Archive. The title, summary are ours.