Question

additional practice
write chemical equations for each of the following reactions.

1. in water, iron (iii) chloride reacts with sodium hydroxide, producing solid iron(iii)

hydroxide and sodium chloride.

1. liquid carbon disulfide reacts with oxygen gas, producing carbon dioxide gas and sulfur

dioxide gas.

1. challenge a piece of zinc metal is added to a solution of dihydrogen sulfate. this

reaction produces a gas and a solution of zinc sulfate.

Explanation:

Step1: Identify reactants and products for Q4

Reactants: FeCl₃ (aq), NaOH (aq); Products: Fe(OH)₃ (s), NaCl (aq)
Balance: FeCl₃ + 3NaOH → Fe(OH)₃↓ + 3NaCl

Step2: Identify reactants and products for Q5

Reactants: CS₂ (l), O₂ (g); Products: CO₂ (g), SO₂ (g)
Balance: CS₂ + 3O₂ → CO₂ + 2SO₂

Step3: Identify reactants and products for Q6

Reactants: Zn (s), H₂SO₄ (aq); Products: H₂ (g), ZnSO₄ (aq)
Balance: Zn + H₂SO₄ → ZnSO₄ + H₂↑

Answer:

1. $\text{FeCl}_3(aq) + 3\text{NaOH}(aq)

ightarrow \text{Fe(OH)}_3(s) + 3\text{NaCl}(aq)$

1. $\text{CS}_2(l) + 3\text{O}_2(g)

ightarrow \text{CO}_2(g) + 2\text{SO}_2(g)$

1. $\text{Zn}(s) + \text{H}_2\text{SO}_4(aq)

ightarrow \text{ZnSO}_4(aq) + \text{H}_2(g)$