Geologists testing rock samples for the presence of carbonate minerals often apply a few drops of dilute hydrochloric acid to the specimen and observe whether effervescence occurs.
Describe the chemical test used to confirm that the gas evolved during this reaction is carbon dioxide, including the observation for a positive result.
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.
