A student wanted to investigate how the pH of the mixture changes as calcium hydroxide is added to dilute sulfuric acid.
They followed this method.
Step 1 Measure out 25.0 cm3 of dilute sulfuric acid into a beaker using a measuring cylinder.
Step 2 Use a glass rod to place a drop of the acid onto a piece of universal indicator paper and record the pH.
Step 3 Add 0.1 g of calcium hydroxide to the acid in the beaker and stir.
Step 4 Use the glass rod to place a drop of the mixture onto a new piece of universal indicator paper and record the pH again.
Step 5 Repeat steps 3–4 until there is no further change in the pH.
Name a piece of equipment which could be used to measure out 25.0 cm3 of dilute sulfuric acid more accurately than the measuring cylinder.
Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 276 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.
