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30-10-2022
Chemistry

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1 A sample of 3.60 g of malic acid, C₂H₂O(CO₂H)₂, was dissolved in 20.0 cm³ of distilled water. The solution was titrated with 0.125 mol dm-3 aqueous sodium hydroxide.
a. Describe how you would carry out this titration.

b. The equation for the reaction is: C₂H4O(COOH)2 + 2NaOH → C₂H4O(COONa)2 + 2H₂O Calculate the volume of aqueous sodium hydroxide used. Express your answer to 3 significant figures.

c. 25 cm³ of a 0.0125 mol dm-3 solution of a metal hydroxide, X(OH)y, was titrated with 0.05 mol dm-3 hydrochloric acid. It required 12.5 cm³ of acid to neutralise the hydroxide. Deduce the value of y and write a balanced equation for the reaction.

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