An environmental chemist is analyzing a sample of industrial wastewater. They add a few drops of sodium hydroxide solution to the sample and observe a green precipitate. The chemist concludes that the wastewater contains iron(II) sulfate.
Explain why this conclusion is not fully justified.
Practise Edexcel GCSE Chemistry Qualitative analysis: tests for ions with exam-style questions for Foundation and Higher tier. 127 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.
