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Qualitative analysis: tests for ions

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Question 2

A student is given an unknown solid, compound X\text{X}X. They carry out two qualitative tests to identify the ions present:

  1. A flame test on compound X\text{X}X produces a green flame.
  2. Compound X\text{X}X is dissolved in distilled water. Dilute nitric acid is added, followed by silver nitrate solution. A cream precipitate is formed.

What is the chemical formula of compound X\text{X}X?

CuBr2CuBr_2CuBr2​

FeBr2FeBr_2FeBr2​

CuI2CuI_2CuI2​

FeI2FeI_2FeI2​

Qualitative analysis: tests for ions Questions

  1. GCSE
  2. /Chemistry
  3. /Qualitative analysis: tests for ions

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.

Question bank