GCSE Edexcel Chemistry Flame photometry: 3 Chemical tests are used to ide

Question

3 Chemical tests are used to identify unknown substances.

(a) A flame test can be used to identify metal ions in a substance.

(i) Complete step 2 of how to carry out a flame test.

step 1 dip a flame test wire in dilute hydrochloric acid and then hold the wire in a roaring Bunsen flame until the flame is colourless

step 2 _______________________________________________________

step 3 hold the wire with the substance in a roaring Bunsen burner flame.

(ii) Many metal ions produce a coloured flame in a flame test.
Draw one straight line from each metal ion to its flame colour in a flame test.

metal ion                     flame colour

blue-green

copper ion                   lilac

potassium ion             orange-red

sodium ion                 red

yellow

3 Chemical tests are used to identify unknown substances - Edexcel - GCSE Chemistry - Question 3 - 2023 - Paper 2