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4 marksTitrimetric (Volumetric) Methods of Analysis

CAPE Chemistry Unit 2 · 2015 · Paper 2 · Question 2(c)(i)

In a thermometric titration, 25 cm^3 of 2 mol dm^-3 NaOH were used to determine the concentration of hydrochloric acid.

Using the results in Table 1, plot a graph of temperature against volume of acid on the axes provided on page 7.

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Other parts of this question

  1. 2(a)(i)In a titrimetric analysis, state ONE operation which can affect accuracy.[1 mark]
  2. 2(a)(ii)In a titrimetric analysis, state ONE operation which can affect precision.[1 mark]
  3. 2(b)List TWO requirements which a primary standard reagent that is to be used in a titrimetric analysis must satisfy.[2 marks]
  4. 2(c)(ii)Hence, determine the end-point volume of the acid.[1 mark]
  5. 2(c)(iii)Calculate the concentration of the acid.[2 marks]
  6. 2(d)Outline the experimental steps for this type of thermometric titration.[4 marks]

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