LT#3: Synthesis, Decomposition, and Single Displacement Reactions

Question 1

Identify the type of reaction and write the balanced chemical equation including states for PH₃(g) + Electricity –>

Answer 1

Decomposition (binary compounds –> elements)

2PH₃(g) –> 2P(s) + 3H₂(g)

Question 1

Identify the type of reaction and write the balanced chemical equation including states for the reaction between Cadmium and Tin (IV) oxide

Answer 1

Single Displacement

2Cd(s) + SnO₂(aq) –> 2CdO(s) + Sn(s)

Question 2

Identify the type of reaction and write the balanced chemical equation including states when CaCO₃ + Heat –>

Answer 2

Decomposition (metallic carbonates –> metal oxide and CO2)

CaCO₃(s) –> CaO(s) + CO₂(g)

Question 2

Identify the type of reaction and write the balanced chemical equation including states for the reaction between Platinum and Chromium chloride

Answer 2

No Reaction

(Pt is lower than Cr on Activity Series)

Question 4

Identify the type of reaction and write the balanced chemical equation including states for the reaction between Nitrogen dioxide and Water

Answer 4

Synthesis (non-metal oxide + water –> acid)

NO₂(g) + H₂O(l) –> HNO₃(s or aq)

Question 6

Identify the type of reaction and write the balanced chemical equation including states for the reaction between Aluminium and Sulphur

Answer 6

Synthesis (metal + non-metal –> ionic compound)

Al(s) + S(s) –> Al₂S₃(s)

Question 7

Identify the type of reaction and write the balanced chemical equation including states for Mn(NO₃)₄ + Heat –>

Answer 7

Decomposition (metallic nitrates –> metal nitrites and O₂)

Mn(NO₃)₄ –> Mn(NO₂)₄ + 2O₂

Question 8

Identify the type of reaction and write the balanced chemical equation including states for the reaction between Nickel (II) oxide + Water

Answer 8

Synthesis (metal oxide + water –> base)

NiO(s) + H₂O(l) –> Ni(OH)₂(s or aq)