Question 1

Which of the following best describes the reaction of a Group 2 oxide with water?

Accepted Answer

It produces a hydroxide and no gas is evolved.

Question 2

What is the balanced chemical equation for the reaction of lithium oxide with hydrochloric acid?

Accepted Answer

$$ \mathrm{Li_2O (s) + 2 HCl (aq) \rightarrow 2 LiCl (aq) + H_2O (l)} $$

Question 3

When strontium oxide reacts with water, what is the product?

Accepted Answer

$$ \mathrm{SrO (s) + H_2O (l) \rightarrow Sr(OH)_2 (aq)} $$

Question 4

Which of the following is a correct balanced equation for the reaction of magnesium oxide with hydrochloric acid?

Accepted Answer

$$ \mathrm{MgO (s) + 2 HCl (aq) \rightarrow $$MgCl_2$$ (aq) + H_2O (l)} $$

Question 5

Which type of compound is formed when an oxide of a Group 1 metal reacts with water?

Accepted Answer

A hydroxide

Question 6

What is the role of water in the reaction with oxides of Group 1 and Group 2 metals?

Accepted Answer

It acts as a reactant to produce hydroxides.

Question 7

Which of the following reactions demonstrates the amphoteric nature of some metal oxides?

Accepted Answer

$$ \mathrm{Al_2O_3 (s) + 6 HCl (aq) \rightarrow 2 $$AlCl_3$$ (aq) + 3 H_2O (l)} $$

Question 8

A student mixes calcium oxide with water in a laboratory. What is the expected observation?

Accepted Answer

Formation of a white precipitate of $$ \mathrm{Ca(OH)_2} $$

Question 9

Which of the following best explains why oxides of Group 1 and Group 2 metals react vigorously with acids?

Accepted Answer

They are basic oxides and neutralize acids to form salts and water.

Question 10

If $$ \mathrm{BaO} $$ reacts with $$ \mathrm{H_2SO_4} $$, what is the balanced equation for the reaction?

Accepted Answer

$$ \mathrm{BaO (s) + H_2SO_4 (aq) \rightarrow $$BaSO_4$$ (s) + H_2O (l)} $$

Question 11

Which of the following is a product when $$ \mathrm{K_2O} $$ reacts with water?

Accepted Answer

$$ \mathrm{2 KOH (aq)} $$

Question 12

A patient accidentally ingests a small amount of calcium oxide. What is the most likely chemical reaction that will occur in the stomach?

Accepted Answer

$$ \mathrm{CaO (s) + 2 HCl (aq) \rightarrow $$CaCl_2$$ (aq) + H_2O (l)} $$

Question 13

Which of the following is a correct statement about the products of oxide reactions with acids?

Accepted Answer

They produce a salt and water.

Question 14

Which equation correctly represents the reaction of $$ \mathrm{Na_2O} $$ with water?

Accepted Answer

$$ \mathrm{Na_2O (s) + H_2O (l) \rightarrow 2 NaOH (aq)} $$

Question 15

Which of the following best describes the chemical change when $$ \mathrm{MgO}  is $$added to hydrochloric acid?

Accepted Answer

A neutralization reaction occurs, forming $$ \mathrm{$$MgCl_2$$} $$ and water.

Question 16

Which of the following is a correct balanced equation for the reaction of $$ \mathrm{CaO} $$ with water?

Accepted Answer

$$ \mathrm{CaO (s) + H_2O (l) \rightarrow Ca(OH)_2 (aq)} $$

Question 17

Which of the following is the correct product when $$ \mathrm{Li_2O} $$ reacts with water?

Accepted Answer

$$ \mathrm{2 LiOH (aq)} $$

Question 18

A chemist wants to neutralize a spill of hydrochloric acid in the lab. Which oxide would be most effective?

Accepted Answer

Magnesium oxide

Oxide Reactions: Water and Acid Reactions of Group 1A and 2A Oxides

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