An analyst is standardising a solution of hydrochloric acid, HCl\text{HCl}HCl, against a standard solution of sodium carbonate, Na2CO3\text{Na}_2\text{CO}_3Na2CO3, using methyl orange indicator.
The diagram shows the setup prepared by the analyst prior to commencing the titration.
The analyst's laboratory notebook contains the following procedural notes for preparing and utilizing the burette:
"I cleaned the burette thoroughly by rinsing it with deionised water. Keeping the tap closed, I positioned a glass funnel at the top and filled the burette with the hydrochloric acid solution until the meniscus rested on the 0.00 cm30.00\text{ cm}^30.00 cm3 mark. I then carefully opened the tap and titrated the acid into the conical flask containing the sodium carbonate and indicator until the solution changed colour from yellow to orange."
State three improvements the analyst must make to the preparation and operation of the burette to guarantee a highly accurate and reliable titration.
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.