In an investigation, calcium hydroxide powder is added in 0.2 g portions to 50 cm3 of dilute nitric acid until the calcium hydroxide is in excess.
Universal indicator paper is used to determine the pH of the mixture after each portion of calcium hydroxide is added.
Give the name of an alternative piece of equipment that can be used to measure the pH of the mixture.
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.