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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