Testing for Positive and Negative Ions

Alex Maraio
Mind Map by Alex Maraio, updated more than 1 year ago
Alex Maraio
Created by Alex Maraio about 6 years ago
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How you can test to see what different Negative and Positive Ions are in a substence
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Resource summary

Testing for Positive and Negative Ions
1 Positive
1.1 Flame Test
1.1.1 By Heating up the compound, it will glow a different colour depending on the Metal Positive Ion
1.1.2 Colours
1.1.2.1 Sodium
1.1.2.1.1 Yellow
1.1.2.2 Calcium
1.1.2.2.1 Brick Red
1.1.2.3 Lithium
1.1.2.3.1 Red (Crimson)
1.1.2.4 Potassium
1.1.2.4.1 Purple (Lilac)
1.1.2.5 Barium
1.1.2.5.1 Green
1.2 Adding Sodium Hydroxide
1.2.1 By adding Sodium Hydroxide to the solution, a precipitate forms
1.2.2 Make sure Compound is a Solution
1.2.3 Coloured Precipitate
1.2.3.1 Copper 2+
1.2.3.1.1 Blue
1.2.3.2 Iron 2+
1.2.3.2.1 Green
1.2.3.3 Iron 3+
1.2.3.3.1 Brown
1.2.4 White Precipitate
1.2.4.1 Calcium
1.2.4.1.1 Flame Test
1.2.4.1.1.1 Brick Red
1.2.4.2 Magnesium
1.2.4.2.1 Flame Test
1.2.4.2.1.1 Nothing
1.2.4.3 Aluminium
1.2.4.3.1 Add Excess
1.2.4.3.1.1 Precipitate will dissolve in excess
2 Negative
2.1 Testing For Carbonates
2.1.1 1) React With An Acid
2.1.2 2) Carbon Dioxide should be produced
2.1.3 3) Bubble it through Lime Water
2.1.3.1 Go from Colourless to Cloudy
2.2 Halides
2.2.1 1) Add Silver Nitrate
2.2.2 2) Add Nitric Acid
2.2.3 3) Look for colours
2.2.3.1 Chlorine
2.2.3.1.1 White
2.2.3.2 Bromine
2.2.3.2.1 Cream
2.2.3.3 Iodine
2.2.3.3.1 Yellow
2.3 Sulphates
2.3.1 1) Add Barium Chloride
2.3.2 2) Add Hydrochloric Acid
2.3.3 A white precipitate will be formed after
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