AQA A-Level Chemistry - Acids and Bases with complete solutions

-log[H+] Calculating pH from H+ ion concentration [H+][OH-] The ionic product of water Kw 00:05 01:36 [H+][A-]/[HA] Ka for weak acids Maintain Temperature How to improve the accuracy of an experiment when constructing a pH curve Equivalence Point The mid point of a titration curve Colourless to Pink Colour change with Phenolphthalein from acid to alkali Pink to Colourless Colour change with Phenolphthalein from alkali to acid Strong Base Strength of base required to use phenolphthalein Any Acid Strength of acid required to use phenolphthalein Strong Strength of acid required to use methyl orange Any Base Strength of base required to use methyl orange Red to Yellow Colour change of Methyl Orange from acid to alkali Yellow to Red Colour change of Methyl Orange from alkali to acid HA Is this method used for Excess HA or OH- in the reaction of a weak acid and strong base? 1) Calculate moles HA (it is still HA and not H+ as it is a weak acid) 2) Calculate moles OH- 3) Calculate moles XS HA or OH 4) Calculate moles HA left and A formed 5) Calculate [HA] leftover and [A-] formed 6) Use Ka to find [H+] 7) Find pH