Question

chemical reactions and chemical equations
rewrite the following sentences as chemical word equations. then write the skeleton equation and balance the equation.

1. iron combines with oxygen to form rust, which is also known as iron(ii) oxide.

word equation:
balanced equation:

1. a solution of hydrogen chloride reacts with sodium carbonate to produce carbon dioxide, sodium chloride, and water.

word equation:
balanced equation:

1. when aluminum metal is exposed to oxygen, a metal oxide called aluminum oxide is formed.

word equation:
balanced equation:

1. water reacts with powered sodium oxide to produce a solution of sodium hydroxide.

word equation:
balanced equation:

1. hydrogen gas reacts with nitrogen trifluoride gas to form nitrogen gas and hydrogen fluoride.

word equation:
balanced equation:

1. chromium(iii) sulphate reacts with potassium carbonate to form chromium(iii) carbonate and potassium sulphate.

word equation:
balanced equation:

1. potassium chlorate when heated becomes oxygen gas and potassium chloride.

word equation:
balanced equation:

1. a piece of metallic zinc is placed in a blue solution of copper(ii) sulphate. a reddish brown layer of metallic copper forms in a clear solution of zinc sulphate.

word equation:
balanced equation:

Explanation:

Translate descriptions to word equations

1. Iron + oxygen $

ightarrow$ iron(II) oxide

1. Hydrogen chloride + sodium carbonate $

ightarrow$ carbon dioxide + sodium chloride + water

1. Aluminum + oxygen $

ightarrow$ aluminum oxide

1. Water + sodium oxide $

ightarrow$ sodium hydroxide

1. Hydrogen + nitrogen trifluoride $

ightarrow$ nitrogen + hydrogen fluoride

1. Chromium(III) sulphate + potassium carbonate $

ightarrow$ chromium(III) carbonate + potassium sulphate

1. Potassium chlorate $

ightarrow$ oxygen + potassium chloride

1. Zinc + copper(II) sulphate $

ightarrow$ copper + zinc sulphate

Write and balance chemical formulas

1. $\text{Fe} + \text{O}_2

ightarrow \text{FeO}$
Balanced: \(2\text{Fe} + \text{O}_2
ightarrow 2\text{FeO}\)

1. $\text{HCl} + \text{Na}_2\text{CO}_3

ightarrow \text{CO}_2 + \text{NaCl} + \text{H}_2\text{O}$
Balanced: \(2\text{HCl} + \text{Na}_2\text{CO}_3
ightarrow \text{CO}_2 + 2\text{NaCl} + \text{H}_2\text{O}\)

1. $\text{Al} + \text{O}_2

ightarrow \text{Al}_2\text{O}_3$
Balanced: \(4\text{Al} + 3\text{O}_2
ightarrow 2\text{Al}_2\text{O}_3\)

1. $\text{H}_2\text{O} + \text{Na}_2\text{O}

ightarrow \text{NaOH}$
Balanced: \(\text{H}_2\text{O} + \text{Na}_2\text{O}
ightarrow 2\text{NaOH}\)

1. $\text{H}_2 + \text{NF}_3

ightarrow \text{N}_2 + \text{HF}$
Balanced: \(3\text{H}_2 + 2\text{NF}_3
ightarrow \text{N}_2 + 6\text{HF}\)

1. $\text{Cr}_2(\text{SO}_4)_3 + \text{K}_2\text{CO}_3

ightarrow \text{Cr}_2(\text{CO}_3)_3 + \text{K}_2\text{SO}_4$
Balanced: \(\text{Cr}_2(\text{SO}_4)_3 + 3\text{K}_2\text{CO}_3
ightarrow \text{Cr}_2(\text{CO}_3)_3 + 3\text{K}_2\text{SO}_4\)

1. $\text{KClO}_3

ightarrow \text{O}_2 + \text{KCl}$
Balanced: \(2\text{KClO}_3
ightarrow 3\text{O}_2 + 2\text{KCl}\)

1. $\text{Zn} + \text{CuSO}_4

ightarrow \text{Cu} + \text{ZnSO}_4$
Balanced: \(\text{Zn} + \text{CuSO}_4
ightarrow \text{Cu} + \text{ZnSO}_4\)

Answer:

Question 1

Word equation: Iron + oxygen \(
ightarrow\) iron(II) oxide
Balanced equation: \(2\text{Fe} + \text{O}_2
ightarrow 2\text{FeO}\)

Question 2

Word equation: Hydrogen chloride + sodium carbonate \(
ightarrow\) carbon dioxide + sodium chloride + water
Balanced equation: \(2\text{HCl} + \text{Na}_2\text{CO}_3
ightarrow \text{CO}_2 + 2\text{NaCl} + \text{H}_2\text{O}\)

Question 3

Word equation: Aluminum + oxygen \(
ightarrow\) aluminum oxide
Balanced equation: \(4\text{Al} + 3\text{O}_2
ightarrow 2\text{Al}_2\text{O}_3\)

Question 4

Word equation: Water + sodium oxide \(
ightarrow\) sodium hydroxide
Balanced equation: \(\text{H}_2\text{O} + \text{Na}_2\text{O}
ightarrow 2\text{NaOH}\)

Question 5

Word equation: Hydrogen + nitrogen trifluoride \(
ightarrow\) nitrogen + hydrogen fluoride
Balanced equation: \(3\text{H}_2 + 2\text{NF}_3
ightarrow \text{N}_2 + 6\text{HF}\)

Question 6

Word equation: Chromium(III) sulphate + potassium carbonate \(
ightarrow\) chromium(III) carbonate + potassium sulphate
Balanced equation: \(\text{Cr}_2(\text{SO}_4)_3 + 3\text{K}_2\text{CO}_3
ightarrow \text{Cr}_2(\text{CO}_3)_3 + 3\text{K}_2\text{SO}_4\)

Question 7

Word equation: Potassium chlorate \(
ightarrow\) oxygen + potassium chloride
Balanced equation: \(2\text{KClO}_3
ightarrow 3\text{O}_2 + 2\text{KCl}\)

Question 8

Word equation: Zinc + copper(II) sulphate \(
ightarrow\) copper + zinc sulphate
Balanced equation: \(\text{Zn} + \text{CuSO}_4
ightarrow \text{Cu} + \text{ZnSO}_4\)