2016, Question 3 · Long answer · 10 points · about 23 minutes

Identifying a metal through its iodide

Calculate an unknown metal’s molar mass and analyze the reaction, physical properties and reduction of iodine.

1 Read the question

The question is College Board's, from the 2016 exam. It starts on page 8 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 3 (PDF, page 8)

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 6) 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.