Edexcel IGCSE Chemistry 2.46 Ammonium ion test
Practise using flame-test colours to identify metal cations from observations, formulae and short multiple-choice options.
- Syllabus
- First assessment 2019
- Course
- Chemistry 4CH1
Exam points
- identify Li+, Na+ and K+ from red, yellow and lilac flame colours
- link a stated flame colour to the correct ion formula,
2.46 Flame-test colours question 1
A student does these two tests on a solution made from a white solid.
- flame test
- add acidified silver nitrate solution
The table shows his results.
Give the formula of the ion that produces the red flame.
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