CART - Chemistry Acceleration Readiness Chemical Reactions and Equations Questions and Answers

Question 1

When the equation for the complete combustion of propane (C₃H₈) is balanced using the smallest whole-number coefficients, what is the coefficient for oxygen (O₂)?

_ C₃H₈ + _ O₂ → _ CO₂ + _ H₂O

Accepted Answer

5

Answer

3

Answer

7

Answer

10

Question 2

The reaction between aqueous silver nitrate and aqueous sodium chloride produces solid silver chloride and aqueous sodium nitrate. How is this reaction best classified?

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

Accepted Answer

Double Displacement (Precipitation)

Answer

Synthesis

Answer

Single Displacement

Answer

Decomposition

Question 3

Aqueous solutions of lead(II) nitrate, Pb(NO₃)₂, and potassium iodide, KI, are mixed, resulting in the formation of a solid precipitate. What is the correct net ionic equation for this reaction?

Accepted Answer

Pb²⁺(aq) + 2I⁻(aq) → PbI₂(s)

Answer

K⁺(aq) + NO₃⁻(aq) → KNO₃(s)

Answer

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq)

Answer

Pb²⁺(aq) + 2NO₃⁻(aq) + 2K⁺(aq) + 2I⁻(aq) → PbI₂(s) + 2KNO₃(s)

Question 4

In the following redox reaction, which substance is oxidized?

2Fe(s) + 3Cl₂(g) → 2FeCl₃(s)

Accepted Answer

Fe

Answer

Cl₂

Answer

FeCl₃

Answer

This is not a redox reaction.

Question 5

A chemist completely reacts 13.08 g of zinc metal (Zn) with an excess of hydrochloric acid (HCl) according to the balanced equation: Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g). What volume of hydrogen gas (H₂) is produced at Standard Temperature and Pressure (STP)? (Molar mass of Zn = 65.38 g/mol)

Accepted Answer

4.48 L

Answer

2.24 L

Answer

1.12 L

Answer

8.96 L

Question 6

Which of the following single displacement reactions will occur spontaneously according to the metal activity series?

Accepted Answer

Zn(s) + CuSO₄(aq) →

Answer

Cu(s) + AlCl₃(aq) →

Answer

Ag(s) + HCl(aq) →

Answer

Fe(s) + MgCl₂(aq) →