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AP Chemistry 3.7.A: Solutions and Mixtures

Explore AP Chemistry 3.7.A questions on calculating molarity, moles of solute, solution volume, dilution, and preparing solutions from stock solutions.

Syllabus
Effective Fall 2025
Course
AP Chemistry

Exam points

  • Explain how redox reactions drive electrochemical cells through electron transfer and potential differences.
  • Apply cell notation, standard potentials and charge balance to predict galvanic or electrolytic behavior.

3.7.A—Calculate the number of solute particles, volume, or molarity of solutions question 1

[Maximum number: 1]

Answer the following questions about magnesium.

A student combines 35.00 mL of 1.85×10−3MMg(NO3)2(aq)1.85 \times 10^{-3} M \mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}(a q) with 50.00 mL of

2.80×10−4MNaOH(aq)2.80 \times 10^{-4} M \mathrm{NaOH}(a q), as shown in the diagram. Calculate [Mg2+]\left[\mathrm{Mg}^{2+}\right] after the two solutions are

combined but before any reaction takes place. (Assume that volumes are additive.)

Beaker 3

Beaker 3

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