Buffers are solutions that buffer against large changes in

Last updated: 5/9/2023

Buffers are solutions that buffer against large changes in pH when an acid or base is added Buffers contain a weak acid to neutralize added base and a weak base to neutralize added acid Most buffer problems want you to calculate the pH For example Calculate the pH of a buffer made from dihydrogen phosphate and hydrogen phosphate when the H PO4 4 44 x 105 M the HPO4 5 55 x 105 M and the K 6 20 x 108 i First identify the acid It s either H PO4 or HPO42 The acid is ii Then write the reaction for the acid dissolving in water iii Then write the expression for the Ka HPO42 H 0 Ka iv Then solve for H 0 and input the number Kal H 0 H O O HPO42 H 0 HPO42 v Finally calculate the pH 6 20 x 10 8X 5 55 x 105 because it has the most acidic hydrogens