Acids
80
0/1

The results of a titration experiment are shown in the graph below.

Figure 1: A titration curve graph showing pH on the vertical axis from 0 to 14 in units of 1, and the volume of sodium hydroxide solution added in \text{cm}^3 on the horizontal axis from 0 to 50 in units of 5. The curve starts at exactly pH 2.0 when 0 \text{cm}^3 of sodium hydroxide has been added, rises slowly to pH 3.0 at 20 \text{cm}^3, increases sharply from pH 3.5 to pH 10.5 between 24 \text{cm}^3 and 26 \text{cm}^3, and then levels off at pH 12.5 by 50 \text{cm}^3.

Using the graph, give the pH of the acid at the start of the titration, before any sodium hydroxide solution was added.

[1]

Acids Questions

Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

PreviousNext

Acids Questions

  1. GCSE
  2. /Chemistry
  3. /Acids