A student wanted to find the exact volume of dilute nitric acid (HNO3\text{HNO}_3HNO3) required to neutralise 20.0 cm3 of potassium hydroxide (KOH\text{KOH}KOH) solution.
They set up the apparatus as shown in Figure 1 below.
The student performed one rough titration followed by three accurate titrations.
Suggest one reason why the student carried out a rough titration before the accurate titrations.
Quantitative analysis Questions
Practise Edexcel GCSE Chemistry Quantitative analysis 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.