The cation test is a test to determine the cation present in a sample solution. The cation test is carried out as part of quantitative analysis in identifying the ions present in a solution. Cation test starts with the use of sodium hydroxide solution and ammonia solution. Different cations react to produce different observations that can be used to identify the specific cation present in the solution.

00:00 - Introduction
00:24 - Cation test using sodium hydroxide solution
00:54 - Ammonium ion
02:23 - White precipitate with a few drops of sodium hydroxide solution
04:29 - Lead (II) ion
05:42 - Aluminium ion
06:06 - Coloured precipitates
06:12 - Copper (II) ion
06:22 - Iron (II) ion and iron (III) ion
06:55 - Confirmatory test for iron (II) and iron (III) ions using potassium hexacyanoferrate and potassium thiocyanate
08:31 - Trick to remember colour of iron (II) and iron (III) ions
09:10 - Cation test using ammonia solution
09:26 - Calcium ion
10:31 - Magnesium ion
10:57 - Zinc ion
11:37 - Magnesium ion
11:56 - Coloured precipitates
12:16 - Dark blue solution of copper (II) ions

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Catering for IGCSE and SPM students.

This can be found in KSSM Chemistry Form 4 Chapter 6 : Acid, Base and Salt

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