3
Given: C = 0.1 M, Ka = 1.8e-5
For weak acid: Ka = [H+]² / (C - [H+])= [H+]² / C
[H+] = sqrt(Ka * C) = sqrt(1.8e-5 * 0.1) = sqrt(1.8e-6) = 1.34e-3 M
Added 38 days ago|1/28/2026 8:45:59 AM
This answer has been confirmed as correct and helpful.
3
0.1 - x 0.1.1.8 × 10^-5 = x^2 / 0.1x^2 = 1.8 × 10^-5 * 0.1x^2 = 1.8 × 10^-6x = (1.8 × 10^-6)x 0.00134
Added 38 days ago|1/28/2026 9:22:20 AM
This answer has been confirmed as correct and helpful.
