To standardise using oxalic acid, first prepare its standard solution by accurately weighing the primary standard crystals. You then titrate this against the alkali, say NaOH, using phenolphthalein, aiming for a permanent pale pink endpoint. The real trick to concordant readings, my dear, is not just precision but patience—rinse all apparatus thoroughly with the solution itself, and add the final drops slowly, "chumma" waiting for the colour to stabilise. I know this because while helping my daughter, I fumbled my first titration by rushing, but her gentle reminder to "wait, appa" just like my granddaughter's, taught me that careful consistency beats haste every time.
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