Question

The pH of a solution is 2.60. What is the [H3O+] for the solution?

2.51 × 102 M
3.98 × 102 M
2.51 × 10−3 M
3.98 × 10−3 M

Answer 1

2.51 x 10⁻³

Step-by-step explanation:

H = - log[H₃O⁺]

∴ 2.60 = - log[H₃O⁺]

log[H₃O⁺] = -2.6.

∴ [H₃O⁺] = 2.51 x 10⁻³.