Question

Yogurt has an approximate pH of 5 and vinegar has an approximate pH of 3. How many times more acidic is vinegar compared to yogurt in terms of concentration?

Answer 1

The vinegar is highly acidic by 100 times than yogurt.

Step-by-step explanation:

∵ pH = -log[H⁺]

• The concentration of H⁺ in yogurt:

∵ pH = -log[H⁺]

∴ 5 = -log[H⁺]

∴ [H⁺] = 1.0 x 10⁻⁵ M.

• The concentration of H⁺ in vinegar:

∵ pH = -log[H⁺]

∴ 3 = -log[H⁺]

∴ [H⁺] = 1.0 x 10⁻³ M.

the ratio of H⁺ in vinegar to that in yogurt = 1.0 x 10⁻³ M / 1.0 x 10⁻⁵ M = 100.0.

∴ The vinegar is highly acidic by 100 times than yogurt.