Question 1

Which of the following is NOT considered evidence of a chemical reaction?

Accepted Answer

Bubbles form when water boils.

Question 2

In the classic baking soda volcano experiment, which gas is produced as a result of the reaction between sodium bicarbonate and acetic acid?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 3

Which of the following best describes a combustion reaction in an automobile engine?

Accepted Answer

A hydrocarbon reacts with oxygen to form carbon dioxide and water.

Question 4

What is the balanced chemical equation for the combustion of methane ($$CH_4) in $$oxygen?

Accepted Answer

$$CH_4(g) + 2O_2(g$$) \rightarrow $$CO_2(g) + 2H_2O(g$$)$$

Question 5

Which of the following compounds is MOST likely to be insoluble in water according to the solubility rules?

Accepted Answer

$$CaCO_3$$

Question 6

When solutions of sodium carbonate ($$Na_2CO_3) $$and copper(II) chloride ($$CuCl_2) $$are mixed, which product will precipitate?

Accepted Answer

$$CuCO_3$$

Question 7

Which of the following is a net ionic equation for the precipitation reaction between silver nitrate ($$AgNO_3) $$and sodium chloride ($$NaCl$$)?

Accepted Answer

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

Question 8

Which of the following reactions is classified as a double-displacement reaction?

Accepted Answer

$$AB + CD \rightarrow AD + CB$$

Question 9

Which of the following is the correct net ionic equation for the neutralization of hydrochloric acid ($$HCl) $$with sodium hydroxide ($$NaOH$$)?

Accepted Answer

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

Question 10

Which of the following is a redox reaction?

Accepted Answer

Combustion of octane ($$C_8H_{18}) in $$oxygen

Question 11

Which of the following is the correct molecular equation for the reaction between potassium iodide ($$KI) $$and lead(II) nitrate ($$Pb(NO_3$)_2$$)?

Accepted Answer

$$2KI(aq) + Pb(NO_3$)_2(aq) \rightarrow $$PbI_2$$(s) + 2KNO_3(aq)$$

Question 12

Which of the following is a synthesis reaction?

Accepted Answer

$$2Na(s) + Cl_2$(g) \rightarrow 2NaCl(s)$$

Question 13

Which of the following is the correct complete ionic equation for the reaction between $$AgNO_3(aq$$)$$ and $$NaCl(aq)$$?

Accepted Answer

$$Ag^+(aq) + NO_3$^-(aq) + Na^+(aq) + Cl^-(aq) \rightarrow AgCl(s) + Na^+(aq) + NO_3$^-(aq)$$

Question 14

Which of the following is a decomposition reaction?

Accepted Answer

$$2H_2O(l) \rightarrow 2H_2(g) + O_2$(g)$$

Question 15

Which of the following is a single-displacement reaction?

Accepted Answer

$$Zn(s) + $$CuCl_2$$(aq) \rightarrow $$ZnCl_2$$(aq) + Cu(s)$$

Question 16

Which of the following is the correct net ionic equation for the reaction between $$H_2SO_4(aq)$$ and $$Ba(OH)_2(aq)$$?

Accepted Answer

$$2H^+(aq) + 2OH^-(aq) \rightarrow 2H_2O(l)$$

Question 17

Which of the following reactions is a gas evolution reaction?

Accepted Answer

$$HCl(aq) + Na_2CO_3(aq) \rightarrow H_2O(l) + CO_2$(g) + NaCl(aq)$$

Question 18

Which of the following is a spectator ion in the reaction between $$AgNO_3(aq$$)$$ and $$NaCl(aq)$$?

Accepted Answer

$$Na^+$$

Chemical Reactions: Evidence, Types, and Equations (Chapter 7 Study Notes)

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