Question 1

Which of the following best describes a strong electrolyte in aqueous solution?

Accepted Answer

A compound that dissolves in water and completely dissociates into ions.

Question 2

What is the molarity of a solution prepared by dissolving $$5.00\ \mathrm{g} of $$NaCl (molar mass $$58.44\ \mathrm{g/mol}) in $$enough water to make $$250.0\ \mathrm{mL} of $$solution?

Accepted Answer

$$0.342\ \mathrm{M}$$

Question 3

Which of the following is a correct net ionic equation for the precipitation reaction between aqueous solutions of silver nitrate and sodium chloride?

Accepted Answer

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

Question 4

A $$50.0\ \mathrm{mL}$$ sample of $$0.200\ \mathrm{M}$$ HCl is titrated with $$0.100\ \mathrm{M}$$ NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$100.0\ \mathrm{mL}$$

Question 5

Which of the following compounds is most likely to be insoluble in water?

Accepted Answer

$$\mathrm{BaSO}_4$$

Question 6

Which of the following statements about oxidation and reduction is correct?

Accepted Answer

Oxidation is the loss of electrons and reduction is the gain of electrons.

Question 7

What is the oxidation state of sulfur in $$\mathrm{H}_2\mathrm{SO}_4$$?

Accepted Answer

$$+6$$

Question 8

Which of the following is a correct molecular equation for the reaction between aqueous solutions of potassium carbonate and calcium chloride?

Accepted Answer

$$\mathrm{K}_2\mathrm{CO}_3 (aq) + \mathrm{CaCl}_2 (aq) \rightarrow 2\mathrm{KCl} (aq) + \mathrm{CaCO}_3 (s)$$

Question 9

A solution is prepared by diluting $$20.0\ \mathrm{mL} of$$ $$3.00\ \mathrm{M}$$ HNO$$_3 to a $$final volume of $$250.0\ \mathrm{mL}. $$What is the final concentration?

Accepted Answer

$$0.240\ \mathrm{M}$$

Question 10

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which an insoluble solid forms when two solutions are mixed.

Question 11

Which of the following is a weak electrolyte?

Accepted Answer

$$\mathrm{CH}_3\mathrm{COOH} ($$acetic acid)

Question 12

Which of the following is the correct net ionic equation for the reaction of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$\mathrm{H}^+ (aq) + \mathrm{OH}^- (aq) \rightarrow \mathrm{H}_2\mathrm{O} (l)$$

Question 13

Which of the following is a polyprotic acid?

Accepted Answer

$$\mathrm{H}_2\mathrm{SO}_4$$

Question 14

In the combustion of methane, $$\mathrm{CH}_4 + 2\mathrm{O}_2 \rightarrow \mathrm{CO}_2 + 2\mathrm{H}_2\mathrm{O}$$, which element is reduced?

Accepted Answer

Oxygen

Question 15

Which of the following best describes the equivalence point in a titration?

Accepted Answer

The point at which the amount of titrant added is stoichiometrically equivalent to the amount of analyte in the solution.

Question 16

Which of the following is the correct oxidation state of nitrogen in $$\mathrm{NO}_3^-$$?

Accepted Answer

$$+5$$

Question 17

Which of the following is a correct complete ionic equation for the reaction between aqueous solutions of sodium sulfate and barium chloride?

Accepted Answer

$$2\mathrm{Na}^+ (aq) + \mathrm{SO}_4$$^{2-}$$ (aq) + \mathrm{Ba}^{2+} (aq) + 2\mathrm{Cl}^- (aq) \rightarrow 2\mathrm{Na}^+ (aq) + 2\mathrm{Cl}^- (aq) + \mathrm{BaSO}_4 (s)$$

Question 18

Which of the following is a correct definition of a base according to the Arrhenius theory?

Accepted Answer

A substance that increases the concentration of $$\mathrm{OH}^-$$ ions in aqueous solution.

Question 19

Which of the following pairs of solutions will produce a precipitate when mixed?

Accepted Answer

$$\mathrm{Pb(NO}_3)_2 (aq) $$and $$\mathrm{KI} (aq)$$

Chem - chapter 8 study guide

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