Solution A and Solution B are two different acid solutions of the same concentration in mol dm−3\text{mol dm}^{-3}mol dm−3. Solution A has a pH of 2.85 and Solution B has a pH of 3.85.
State the apparatus that must be used to measure these pH values to two decimal places.
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.