Cambridge O Level
UCLES 2020 5070/31/O/N/20 1 Citric acid is a carboxylic acid found in lemon juice. The equation for the reaction between citric acid, H 3C 6H 5O 7, and potassium hydroxide, KOH, is shown. 3KOH + H 3C 6H 5O 7 K 3C 6H 5O 7 + 3H 2O The mass of citric acid dissolved in 500 cm3 of an aqueous solution can be determined by titration with KOH(aq). ................
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