C3 Tests for Ions- Chemical Analysis

Mnemonics and ways to remember the different ways of testing positive and negative ions.

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  • Created by: Stephanie
  • Created on: 09-05-13 15:49
Cations-Positive Ions: Flame Test. Method: Dip wire loop in HCL then distilled water to purify. Dip in the compound and hold in the blue bunsen burner flame. Colours: Lithium-Crimson; Sodium-Yellow; Potassium-Lilac; Calcium-Red; Barium-Green
Mnemonics: Lumpy, Stinky, Pigs, Cook, Bacon- compounds, Cause, You, Like, Ready, Grilled- colours. Alternatively: Lithium-lips-crimson; Sunny Sodium-Yellow; Purple Potassium-Lilac; Carcass Calcium-red; Bruised Barium-Green
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Coloured Precipitates with NAOH. Method: Add a few drops of NAOH solution, a coloured precipitate will form. Colours: Calcium-White; Copper-Blue; Iron(II)-Green; Iron(III)-Brown; Aluminium-white (redissolves in excess-colourless); Magnesium-White
Mnemonic: Coarse, Copper, Irritates, Iguanas, At, Meals - compounds. When, Bread, Goes, Brown, When, White - Colours
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Anions-Negative Ions: Testing for Carbonates. Method: Bubble the gas produced by a carbonate and a dilute acid through limewater, it will turn cloudy.
Imagine squeezing lime juice into water (or squash) the water will change colour by going cloudy
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Halides. Method: Add dilute Nitric acid followed by Silver Nitrate Solution. Colours: A chloride-white precipitate-Silver Chloride; Bromide-Cream Precipitate-Silver Bromide; Iodide-Yellow precipitate-Silver Iodide
Mnemonic: Chlorine, Bats, In - Halides, Wyoming, Can, Yelp - colours
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Sulphate Ions. Method: Add dilute HCL followed by Barium Chloride Solution. Colour: A white precipitate of Barium Sulphate means the original compound was a sulphate
LEARN IT!! :)
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Other cards in this set

Card 2

Front

Mnemonic: Coarse, Copper, Irritates, Iguanas, At, Meals - compounds. When, Bread, Goes, Brown, When, White - Colours

Back

Coloured Precipitates with NAOH. Method: Add a few drops of NAOH solution, a coloured precipitate will form. Colours: Calcium-White; Copper-Blue; Iron(II)-Green; Iron(III)-Brown; Aluminium-white (redissolves in excess-colourless); Magnesium-White

Card 3

Front

Imagine squeezing lime juice into water (or squash) the water will change colour by going cloudy

Back

Preview of the back of card 3

Card 4

Front

Mnemonic: Chlorine, Bats, In - Halides, Wyoming, Can, Yelp - colours

Back

Preview of the back of card 4

Card 5

Front

LEARN IT!! :)

Back

Preview of the back of card 5

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