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5 marksTitrimetric (Volumetric) Methods of Analysis

CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2 · Question 2(c)

Outline FIVE experimental steps to be carried out in the determination of the ethanoic acid content of vinegar by titration with sodium hydroxide solution.

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  1. 2(a)State THREE reasons why NaHCO3 can be used as a primary standard and ONE reason why sodium hydroxide (NaOH) may NOT be used.[4 marks]
  2. 2(b)(i)Write the balanced equation for the reaction between sodium hydrogen carbonate and sulphuric acid.[2 marks]
  3. 2(b)(ii)Calculate the mass in grams of sodium hydrogen carbonate that the student used to neutralise the acid if 23.00 cm3 of 6.00 mol dm-3 sulphuric acid were used…[4 marks]

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