Question

Classify the chemical reaction shown here:

Mg + H2SO4 → MgSO4 + H2

A. Combination
B. Single replacement
C. Decomposition
D. Double replacement

Answer 1

Single-Replacement Reaction

General Formulas and Concepts:

Chemistry - Reactions

• Synthesis Reactions: A + B → AB
• Decomposition Reactions: AB → A + B
• Single-Replacement Reactions: A + BC → AB + C
• Double-Replacement Reactions: AB + CD → AD + BC

Step-by-step explanation:

Step 1: Define RxN

Mg + H₂SO₄ → MgSO₄ + H₂

Step 2: Identify RxN

Mg + H₂SO₄ → MgSO₄ + H₂

Single-Replacement Reaction A + BC → AB + C

• A = Mg
• BC = H₂SO₄
• AB = MgSO₄
• C = H₂