AP Chemistry 3.7 A Calculate the Number of Solute Particles Volume or Molarity of Solutions Questions

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

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.

[Maximum number: 1]

Answer the following questions about magnesium.

A student combines 35.00 mL of $1.85 \times 10^{-3} M \mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}(a q)$ with 50.00 mL of $2.80 \times 10^{-4} M \mathrm{NaOH}(a q)$ , as shown in the diagram. Calculate $\left[\mathrm{Mg}^{2+}\right]$ after the two solutions are combined but before any reaction takes place. (Assume that volumes are additive.)

Beaker 3

D For the correct calculated value:

Point 06

$\begin{aligned} & M_{1} V_{1}=M_{2} V_{2} \\ & M_{2}=\frac{\left(1.85 \times 10^{-3} M\right)(0.03500 \mathrm{~L})}{(0.03500 \mathrm{~L}+0.05000 \mathrm{~L})}=7.62 \times 10^{-4} M \end{aligned}$

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AP Chemistry 3.7 A Calculate the Number of Solute Particles Volume or Molarity of Solutions Questions question 1