Multiple choice The potassium salt used for the determination of potassium by gravimetry is potassium hydrogenoxalate potassium hexafluorophosphate potassium hexafluoronickelate potassium hexachloroplatinate Reveal answer Fill a bubble to check yourself D Correct answer Explanation Potassium hexachloroplatinate, an inorganic compound, is an example of a comparatively insoluble potassium salt.The precipitation of this compound from solutions of hexachloroplatinic acid is used for the determination of potassium by gravimetry.