Explain how a buffer solution resists the pH change when an acid or alkali is added.

HA <----> H+ + OH-Acid:Adding an acid increases the concentration of H+ ions as acids are proton donors. These H+ ions react with the conjugate base, A-, to form HA and thus shift the equilibrium position to the left to reduce the concentration of H+.Base:Adding a base increases the concentration of OH- ions. These react with the H+ ions already in solution to form H2O. This reduces the concentration of H+ and so the equilibrium position shifts right to reduce the change due to Le Chatelier's principle.

Answered by Alexander F. Chemistry tutor

9198 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Why does the nucleophilic addition of a cyanide ion to an aldehyde form a racemic mixture?


What are Van Der Waals dispersion forces?


Which of Na+ and Mg2+ is the smaller ion. Explain your answer. (2 marks)


What is electronegativity?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences