Question 1

Which of the following statements best describes a solution?

Accepted Answer

A solution is a homogeneous mixture in which the solute and solvent are uniformly distributed.

Question 2

What is the molarity of a solution prepared by dissolving $5.45\ \mathrm{g}$ of $\mathrm{NaNO_3}$ in enough water to make $250.0\ \mathrm{mL}$ of solution? (Molar mass of $\mathrm{NaNO_3} = 85.0\ \mathrm{g/mol}$)

Accepted Answer

$0.256\ \mathrm{M}$

Question 3

A student wants to prepare $500.0\ \mathrm{mL}$ of $0.250\ \mathrm{M}$ $\mathrm{KBr}$ solution. How many grams of $\mathrm{KBr}$ are required? (Molar mass of $\mathrm{KBr} = 119.0\ \mathrm{g/mol}$)

Accepted Answer

$14.9\ \mathrm{g}$

Question 4

Which equation correctly represents the dilution of a solution?

Accepted Answer

$M_1V_1 = M_2V_2$

Question 5

A chemist has $2.00\ \mathrm{L}$ of $1.50\ \mathrm{M}$ $\mathrm{NaOH}$ stock solution. What volume of this stock solution is needed to prepare $3.00\ \mathrm{L}$ of $1.00\ \mathrm{M}$ $\mathrm{NaOH}$ solution?

Accepted Answer

$2.00\ \mathrm{L}$

Question 6

Which of the following compounds will form a strong electrolyte solution when dissolved in water?

Accepted Answer

$\mathrm{NaCl}$ (sodium chloride)

Question 7

Which of the following is a correct net ionic equation for the reaction between $\mathrm{AgNO_3}(aq)$ and $\mathrm{NaCl}(aq)$?

Accepted Answer

$\mathrm{Ag^+(aq) + Cl^-(aq) \rightarrow AgCl(s)}$

Question 8

Which of the following is NOT a spectator ion in the reaction between $\mathrm{K_2SO_4}(aq)$ and $\mathrm{Ba(NO_3)_2}(aq)$?

Accepted Answer

$\mathrm{Ba^{2+}}$

Question 9

Which of the following acids is a diprotic acid?

Accepted Answer

$\mathrm{H_2SO_4}$

Question 10

What is the product of the neutralization reaction between $\mathrm{HCl}(aq)$ and $\mathrm{NaOH}(aq)$?

Accepted Answer

$\mathrm{NaCl}(aq) + H_2O(l)$

Question 11

A $25.0\ \mathrm{mL}$ sample of $0.100\ \mathrm{M}$ $\mathrm{NaOH}$ is required to neutralize $50.0\ \mathrm{mL}$ of an unknown $\mathrm{HCl}$ solution. What is the concentration of the $\mathrm{HCl}$ solution?

Accepted Answer

$0.0500\ \mathrm{M}$

Question 12

Which of the following reactions is a gas-evolution reaction?

Accepted Answer

$\mathrm{Na_2CO_3(aq) + 2HCl(aq) \rightarrow 2NaCl(aq) + H_2O(l) + CO_2(g)}$

Question 13

Which of the following is the correct oxidation state of sulfur in $\mathrm{SO_4^{2-}}$?

Accepted Answer

$+6$

Question 14

In the reaction $2\mathrm{Na}(s) + \mathrm{Cl_2}(g) \rightarrow 2\mathrm{NaCl}(s)$, which element is oxidized?

Accepted Answer

Sodium

Question 15

Which of the following is the reducing agent in the reaction $\mathrm{Zn}(s) + \mathrm{Cu^{2+}}(aq) \rightarrow \mathrm{Zn^{2+}}(aq) + \mathrm{Cu}(s)$?

Accepted Answer

$\mathrm{Zn}$

Question 16

Which of the following reactions is NOT a redox reaction?

Accepted Answer

$\mathrm{HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)}$

Question 17

Which of the following metals will react spontaneously with $\mathrm{Cu^{2+}}(aq)$ according to the activity series?

Accepted Answer

Magnesium

Question 18

Which of the following best explains why $\mathrm{NaCl}$ conducts electricity when dissolved in water, but $\mathrm{C_6H_{12}O_6}$ does not?

Accepted Answer

$\mathrm{NaCl}$ forms ions in solution, while $\mathrm{C_6H_{12}O_6}$ does not.

Chapter 8: Introduction to Solutions and Aqueous Reactions – Solution Concentration and Stoichiometry

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