Question 1

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction where two solutions are mixed and a solid forms.

Question 2

What is the net ionic equation for the reaction between aqueous solutions of silver nitrate and sodium chloride?

Accepted Answer

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

Question 3

Which of the following compounds is insoluble in water?

Accepted Answer

$$ \mathrm{$$BaSO_4$$} $$

Question 4

A student mixes solutions of $$ \mathrm{Pb(NO_3$)_2} $$ and $$ \mathrm{KI} . $$What is the precipitate formed?

Accepted Answer

$$ \mathrm{$$PbI_2$$} $$

Question 5

Which of the following is a strong electrolyte?

Accepted Answer

$$ \mathrm{NaCl} $$

Question 6

What is the balanced molecular equation for the reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

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

Question 7

Which of the following is a weak acid?

Accepted Answer

$$ \mathrm{CH_3COOH} $$

Question 8

A solution of $$ \mathrm{Ba(NO_3$)_2}  is $$mixed with a solution of $$ \mathrm{Na_2SO_4} . $$What is the net ionic equation for the reaction?

Accepted Answer

$$ \mathrm{Ba$$^{2+}$$ (aq) + SO_4$^{2-} (aq) \rightarrow $$BaSO_4$$ (s)} $$

Question 9

Which of the following best describes a neutralization reaction?

Accepted Answer

A reaction between an acid and a base to produce water and a salt.

Question 10

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

Accepted Answer

$$ \mathrm{CH_3COOH (aq) + OH^- (aq) \rightarrow CH_3COO^- (aq) + H_2O (l)} $$

Question 11

Which of the following is a characteristic of a strong acid?

Accepted Answer

It completely ionizes in aqueous solution.

Question 12

Which of the following is a spectator ion in the reaction between $$ \mathrm{Na_2SO_4} $$ and $$ \mathrm{$$BaCl_2$$} $$?

Accepted Answer

$$ \mathrm{Na^+} $$

Question 13

A solution of $$ \mathrm{H_2SO_4}  is $$added to a solution of $$ \mathrm{Ba(NO_3$)_2} . $$What is the precipitate formed?

Accepted Answer

$$ \mathrm{$$BaSO_4$$} $$

Question 14

Which of the following is the correct net ionic equation for the reaction between hydrochloric acid and potassium hydroxide?

Accepted Answer

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

Question 15

Which of the following is a weak electrolyte?

Accepted Answer

$$ \mathrm{NH_3$} $$

Question 16

Which of the following best describes a gas evolution reaction?

Accepted Answer

A reaction where a gas is produced as a product.

Question 17

Which of the following is the correct molecular equation for the reaction between $$ \mathrm{Na_2CO_3} $$ and $$ \mathrm{HCl} $$?

Accepted Answer

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

Question 18

Which of the following is a strong base?

Accepted Answer

$$ \mathrm{KOH} $$

Question 19

Which of the following is the correct net ionic equation for the reaction between $$ \mathrm{Na_2CO_3} $$ and $$ \mathrm{HCl} $$?

Accepted Answer

$$ \mathrm{CO_3$^{2-} (aq) + 2H^+ (aq) \rightarrow H_2O (l) + CO_2$ (g)} $$

Introduction to Significant Figures and Scientific Notation

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