Chemistry 101 Introductory Chemistry Chapter 7 Chemical Reactions

In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?

(s)

As defined in the text, identify the "gas evolution" reactions among the following: 1. 2HCl (aq) +K2CO3 (aq) ⟶ H2O (l) + CO2 (g) + 2KCl (aq) 2. CH4 (g) +2O2 (g) ⟶ CO2 (g) + 2H2O (l) 3. 2HCl (aq) + K2S (aq) ⟶ H2S (g) + 2KCl (aq)

1 and 3 only

Methane gas (CH4), on complete combustion in air, produces: 1. CO2 2. H2 3. H2O

1 and 3 only

If you had an aqueous mixture that contained Ag+, K+, and Pb2+ cations, how many different solids could precipitate if a chloride solution was added?

2

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. Which equation below best describes the balanced equation for this reaction?

2 Na+2H2O →2NaOH (aq) + H2 (g)

What are the coefficients for the following reactions when it is properly balanced? ___ HCl + ___ Mg ⟶ ___ MgCl2 + ___ H2

2,1,1,1

What are the coefficients for the following reaction when it is properly balanced? ___ O2 + ___ CH4 ⟶ ___ CO2 + ___ H2O

2,1,1,2

Identify the double displacement reactions among the following: 1. KCl (aq) + AgNO3 (aq) ⟶ AgCl (s) +KNO3 (aq) 2. Na2SO4 (aq) +BaCl2 (aq) ⟶ BaSO4 (aq) +2 NaCl (aq) 3. H2SO4 (aq) + NaOH (aq) ⟶ Na2SO4 (aq) + 2H2O (l)

All of 1,2, and 3

When a solution of MgCl2and one of AgNO3 are mixed, the net ionic equation is:

Cl-(aq)+ Ag+(aq) --> AgCl (s)

A net ionic equation shows all ionic species that are present in solution.

False

Bubbles in water that appear during boiling show that a chemical reaction is occurring.

False

Which is a spectator ion from the following complete ionic equation: Ag+(aq)+ NO3-(aq)+Br-(aq) ⟶ AgBr (s) + K+(aq)+NO3-(aq)

K+

Considering the following precipitation reaction: Pb(NO3)2 (aq) + 2KI(aq) ⟶ PbI2 (aq) + 2 KNO3 (aq) Which ion(s) would NOT be spectator ions?

Pb2+, I-

Li+, Na+, K+ and NH4+ compounds are soluble.

True

The following equation IS balanced: HNO3 + NaHSO3⟶ NaNO3 + H2O + SO2

True

The reaction 2 KClO3⟶ 2 KCl + 3O2 would be correctly classified as a decomposition reaction.

True

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

carbon dioxide

What type of a reaction occur when a potassium nitrate solution is mixed with a barium acetate solution?

no reaction

What type of a reaction occurs when potassium metal reacts with fluorine gas?

oxidation-reduction

A reaction which forms a solid product is an example of a(n):

precipitation reaction