During an investigation into the change in pH during a neutralisation reaction, a student adds 0.1 g portions of calcium hydroxide powder to 25 cm3 of dilute hydrochloric acid.
Explain why the mixture must be stirred continuously after adding each portion of calcium hydroxide before measuring the pH.
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.