Question 1

Which of the following statements best explains why deionized water does not conduct electricity?

Accepted Answer

Deionized water contains no ions to carry electrical current.

Question 2

Which of the following is a strong electrolyte when dissolved in water?

Accepted Answer

NaCl

Question 3

Which of the following compounds is a nonelectrolyte in aqueous solution?

Accepted Answer

$$C_{12}$H_{22}O$$_{11}

Question 4

Which of the following best describes a weak electrolyte?

Accepted Answer

A substance that partially ionizes in water, producing a small concentration of ions.

Question 5

Which of the following is the correct molecular equation for the reaction between aqueous magnesium nitrate and aqueous sodium chromate to produce solid magnesium chromate and aqueous sodium nitrate?

Accepted Answer

$$ \mathrm{Mg(NO_3)_2(aq) + Na_2CrO_4(aq) \rightarrow MgCrO_4(s) + 2NaNO_3(aq)} $$

Question 6

According to the solubility rules, which of the following compounds is insoluble in water?

Accepted Answer

AgBr

Question 7

Which of the following is the correct net ionic equation for the neutralization reaction between aqueous $$HClO_4$$ and aqueous NaOH?

Accepted Answer

$$ \mathrm{H^+(aq) + OH^-(aq) \rightarrow H_2O(l)} $$

Question 8

Which of the following best describes a precipitation reaction?

Accepted Answer

Two ionic solutions are mixed to produce an insoluble ionic solid.

Question 9

Which of the following is the correct balanced equation for the decomposition of calcium carbonate?

Accepted Answer

$$ \mathrm{CaCO_3(s) \rightarrow CaO(s) + CO_2(g)} $$

Question 10

Which of the following metals will react with water to produce a metal hydroxide and hydrogen gas?

Accepted Answer

Ca

Question 11

In the reaction $$ \mathrm{Zn(s) + 2AgNO_3(aq) \rightarrow Zn(NO_3)_2(aq) + 2Ag(s)} $$, which species is oxidized?

Accepted Answer

Zn

Question 12

What is the oxidation number of chromium in $$ \mathrm{MgCrO_4} $$?

Accepted Answer

+6

Question 13

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of Pb($$NO_3)_2 $$and Na_2SO_4?

Accepted Answer

$$ \mathrm{Pb^{2+}(aq) + SO_4^{2-}(aq) \rightarrow PbSO_4(s)} $$

Question 14

A 1.00 L sample of water is found to contain 229.8 mg of $$PbSO_4$$ after precipitation. What is the concentration of lead $$(Pb^{2+}) in mg/L in $$the original sample? (Molar mass of $$PbSO_4 = 303.26 g/$$mol, Pb = 207.2 g/mol)

Accepted Answer

207.2 mg/L

Question 15

Which of the following best describes a Bronsted-Lowry acid?

Accepted Answer

A substance that donates a proton (H^+) to another substance.

Question 16

Which of the following is the conjugate base of H_2O in the reaction $$ \mathrm{H_2O(l) + NH_3(aq) \rightarrow NH_4^+(aq) + OH^-(aq)} $$?

Accepted Answer

OH^-

Question 17

Which of the following best describes a double displacement reaction?

Accepted Answer

Two ionic compounds exchange ions to form two new compounds.

Question 18

What is the molarity of a solution prepared by dissolving 0.50 mol of NaCl in enough water to make 250 mL of solution?

Accepted Answer

$$ 2.0\ \mathrm{M} $$

Question 19

Which of the following is the correct formula to use when diluting a solution?

Accepted Answer

$$ M_1V_1 = M_2V_2 $$

Chemical Reactions and Solution Chemistry: Electrolytes, Nonelectrolytes, and Ionic Theory

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