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


How you can test to see what different Negative and Positive Ions are in a substence

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 Sodium Yellow Calcium Brick Red Lithium Red (Crimson) Potassium Purple (Lilac) Barium 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 Copper 2+ Blue Iron 2+ Green Iron 3+ Brown
1.2.4 White Precipitate Calcium Flame Test Brick Red Magnesium Flame Test Nothing Aluminium Add Excess 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 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 Chlorine White Bromine Cream Iodine 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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