Ch. 11.1 - Describing Chemical Reactions

Ch. 11.1

Describing Chemical Reactions

Fill in the Blanks

The substances that undergo a chemical change are the

.

Fill in the Blanks

The new substances formed in a chemical reaction are the

.

Multiple Choice

Sulfur burns in oxygen to form sulfur dioxide. Select the correct skeleton equation for this chemical reaction.

• S + O₂ --> SO₂

• S + O --> SO₂

• S₈ + O --> SO₂

• S₂ + O₂ --> SO₂

Multiple Choice

Which of the following is a skeleton equation?

• 2H₂ + CO₂ 🡪 CH₃OH

• 2H₂ + CO 🡪 CH₃OH

• H₂ + CO 🡪 CH₃OH

• Hydrogen + carbon monoxide 🡪 methanol

Multiple Choice

Select the correct skeleton equation for this word equation.

Hydrogen + Sulfur --> Hydrogen Sulfide

• H + S --> HS

• H + S --> H₂S

• H₂ + S --> HS₂

• H₂ + S --> H₂S

Multiple Choice

Select the correct coefficients to balance this equation.

_H₂ + _S --> _H₂S

Hydrogen + Sulfur --> Hydrogen Sulfide

• 1, 2, 1

• 1, 1, 1

• 2, 1, 2

• 2, 1, 1

Multiple Choice

Select the correct skeleton equation for this word equation.

Iron (III) chloride + Calcium hydroxide --> Iron (III) hydroxide + Calcium chloride

• FeCl + CaOH --> FeOH + CaCl

• FeCl₃ + Ca(OH)₂ --> Fe(OH)₃ + CaCl₂

• Fe₃Cl + Ca₂OH --> Fe₃OH + Ca₂Cl

• FeCl₃ + CaOH --> Fe(OH)₃ + CaCl

Multiple Choice

Select the correct skeleton equation for this word equation.

Calcium hydroxide + sulfuric acid --> calcium sulfate + water

• CaOH + HSO₄ --> CaSO₄ + H₂O

• Ca(OH)₂ + H₂S --> CaS + H₂O

• Ca(OH)₂ + H₂SO₄ --> CaSO₄ + H₂O

• Ca(OH)₂ + H₂SO₃ --> CaSO₃ + H₂O

Multiple Choice

Select the correct coefficients to balance the skeleton equation.

_Ca(OH)₂ + _H₂SO₄ --> _CaSO₄ + _H₂O

• 1, 1, 1, 2

• 1, 1, 1, 1

• 1, 2, 2, 1

• 2, 1, 2, 1

Multiple Choice

What coefficient for H₂SO₄ is required to balance the following equation?

Ca₃(PO₄)₂ + ____ H₂SO₄ → 3CaSO₄ + 2H₃PO₄

• 1

• 2

• 3

• 4

Open Ended

Write a balance chemical equation for the following reaction.

Aluminum reacts with aqueous hydrochloric acid to form hydrogen gas and aqueous aluminum chloride.

Open Ended

Write a balance chemical equation for the following reaction.

Acetylene gas (C₂H₂) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor.