Summary GCSE Chemistry Edexcel - GCSE Chemistry - Paper 2 - Topic 9a - Test for ions
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Course
Chemistry
Institution
GCSE
Everything you need to know for the Test for Ions in very good detail, specifically the different colours and methods for testing for ions. all in one place so that you can ace your exams
When a Carbonate reacts with a dilute acid you get a salt, water
and carbon dioxide
Ionic equation = CO3 2- (aq) + 2H+ (aq) --> CO2 (aq) + H2O (l)
Test for Carbonate ions
You can test for carbonate ions in a solution by using a dropping
pipette to add a couple of drops of dilute acid to a test tube
containing the unknown solution.
Then bubble any gas that is produce through some limewater
If it turns cloudy, then CO2 is present
Add dilute hydrochloric acid to get rid of any carbonates
Then add barium chloride solution Test for sulphate ions
If a white precipitate forms, barium sulphate, the test is positive
Ba2+ (aq) + SO4 2- (aq) --> BaSO4 (s)
Add dilute nitric acid to get rid of any carbonate ions, which
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