When dilute hydrochloric acid reacts with sodium thiosulfate solution, a precipitate of sulfur is formed, which makes the mixture go cloudy. Toxic sulfur dioxide gas (SO2SO_2SO2) is also produced as a byproduct.
Give one safety precaution that the student should take when carrying out this experiment, other than wearing safety goggles.
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 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.
