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Qualitative analysis: tests for ions

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Question 26

A student is handed an aqueous solution of an unknown transition metal salt Y Y\,Y to identify. They carry out two qualitative tests:

  • Test 1: They add dilute sodium hydroxide solution dropwise to a sample of the solution. A green precipitate forms which remains insoluble when excess sodium hydroxide is added.
  • Test 2: They acidify a second sample of the solution with dilute nitric acid and then add silver nitrate solution. A cream precipitate is observed.

What is the formula of salt YYY?

FeBr3\text{FeBr}_3FeBr3​

FeBr2\text{FeBr}_2FeBr2​

FeCl2\text{FeCl}_2FeCl2​

FeI2\text{FeI}_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