Question

Identify the following as combination, decomposition, replacement, or ion exchange reactions: ZnCO3(s) → ZnO(s) + CO2 ↑ 2 NaBr(aq) + Cl2(g) → 2 NaCl(aq) + Br2(g) 2 Al(s) + 3 Cl2(g) → 2 AlCl3(s) Ca(OH)2(aq) + H2SO4(aq) → CaSO4(aq) + 2 H2O(l) Pb(NO3)2(aq) + H2S(g) → 2 HNO3(aq) + PbS↓ C(s) + ZnO(s) → Zn(s) + CO↑

Answer 1

ZnCO₃(s) → ZnO(s) + CO₂ ↑ Decomposition

2NaBr(aq) + Cl₂(g) → 2NaCl(aq) + Br₂(g) Replacement

2Al(s) + 3Cl₂(g) → 2AlCl₃(s) Combination

Ca(OH)₂(aq) + H₂SO₄(aq) → CaSO₄(aq) + 2H₂O(l) Ion Exchange.

Pb(NO₃)₂(aq) + H₂S(g) → 2HNO₃(aq) + PbS↓ Ion Exchange.

C(s) + ZnO(s) → Zn(s) + CO↑ Replacement.

Step-by-step explanation:

We have a st of reaction, we need to identify them as Combination, decomposition, replacement or ion exchange reactions:

First reaction is:

ZnCO₃(s) → ZnO(s) + CO₂ ↑

This reaction involves the breakdown of the reagent into its component individual elements or other compounds. We can identify this reaction as: Decomposition reaction.

Second Reaction is:

2NaBr(aq) + Cl₂(g) → 2NaCl(aq) + Br₂(g)

This is a single replacement reaction in which Cl replaces the Br in the molecule. We can identify this reaction as: Replacement reaction.

Third reaction is:

2Al(s) + 3Cl₂(g) → 2AlCl₃(s)

Here two reagents react to form a single product. We can identify this reaction as: Combination reaction:

Fourth reaction:

Ca(OH)₂(aq) + H₂SO₄(aq) → CaSO₄(aq) + 2H₂O(l)

In this reaction, SO₄ and OH Ions exchange position. We can identify this reaction as: Ion Exchange.

Fifth reaction:

Pb(NO₃)₂(aq) + H₂S(g) → 2HNO₃(aq) + PbS↓

In this reaction, S and NO₃ Ions exchange position. We can identify this reaction as: Ion Exchange.

Sixth reaction:

C(s) + ZnO(s) → Zn(s) + CO↑

This is a single replacement reaction in which Oxygen replaces Carbon. This reaction can be identified as: Replacement reaction.

Answer 2

Step-by-step explanation:

ZnCO₃(s) → ZnO(s) + CO₂ ↑

Decomposition reaction:

This involves the breakdown of a compound into its component individual elements or other compounds.

2NaBr(aq) + Cl₂(g) → 2NaCl(aq) + Br₂(g)

Replacement reaction

This is a single replacement reaction in which one substance replaces the other.

2Al(s) + 3Cl₂(g) → 2AlCl₃(s)

Combination reaction:

Here, a single compound forms from two or more reacting species.

Ca(OH)₂(aq) + H₂SO₄(aq) → CaSO₄(aq) + 2H₂O(l)

Replacement reaction:

This is a double replacement reaction in which ions are exchanged to form new compounds.

Pb(NO₃)₂(aq) + H₂S(g) → 2HNO₃(aq) + PbS↓

Replacement reaction:

This is a double replacement reaction in which ions are exchanged to form new compounds.

C(s) + ZnO(s) → Zn(s) + CO↑

Replacement reaction

This is a single replacement reaction in which one substance replaces the other.