Question

The pH of 10-2 M H₂SO₄ is:

• A. 2
• B. 7
• C. 1.7
• D. 1

Answer 1

Answer:

C. 1.7

H₂SO₄ is a strong acid, and it completely dissociates into H⁺ and SO₄²⁻ ions:

H₂SO₄ → 2H⁺ + SO₄²⁻

The concentration of H⁺ ions is:

[H⁺] = 2 × 10⁻² M = 2 × 10⁻² M

Now, we can calculate the pH:

pH = -log[H⁺]
= -log(2 × 10⁻²)
≈ 1.7

So, the pH of 10⁻² M H₂SO₄ is approximately 1.7.