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

9204 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Name and explain the three types of isomerism present in organic compounds.


What is electronegativity?


Giving the electronic configurations for each element, predict the trend in 1st ionisation energies going across period 2 from Lithium to Neon.


What evidence is there to support the delocalised model of benzene over Kekulé's model?


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