What is the pH of a weak acid?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The pH of a weak acid typically ranges from 3 to 6, depending on its concentration and acid dissociation constant (Ka). Unlike strong acids that have pH values close to 0-1, weak acids only partially ionize in solution, resulting in fewer free hydrogen ions and therefore a higher pH. For example, acetic acid solutions generally have pH values between 2.4 and 4.8 depending on concentration. The exact pH can be calculated using the acid's Ka value and its molar concentration.
Suggested Q&A
General · Class 12- GeneralClass 12Electric Field at Centre of Ring with Non-Uniform Charge Distribution. Four quadrants carry linear charge densities: +2λ, −2λ, +λ, −λ. Find electric field at centre.
- GeneralClass 12P°(hexane) = 408 Torr, P°(heptane) = 141 Torr. x(hexane) = 0.300. Find Y₆ and Y₇.
- GeneralClass 122N₂O₅(g) → 4NO₂(g) + O₂(g). Initial P = 50 mmHg; P at 30 min = 87.5 mmHg. Find P at 60 min.
- GeneralClass 12What is the difference between psychosis and neurosis?
- GeneralClass 12What is the difference between prism and a pyramid?
- GeneralClass 12What is the difference between phrase and clause?