2016, Question 6 · Short answer · 4 points · about 9 minutes
Barium and EDTA equilibrium
Calculate equilibrium concentrations for a barium complex and predict the response of the equilibrium to dilution.
Lessons this question draws on
1 Read the question
The question is College Board's, from the 2016 exam. It starts on page 13 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 June 18, 2025.
Open Question 6 (PDF, page 13)
2 Write your answer
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Scoring guidelines (PDF, page 12) 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.