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12328240
Chemistry Analysis 2
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Chemistry 2
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aqa
chemistry
chemistry
gcse
Mind Map by
D B
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Created by
D B
over 6 years ago
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Resource summary
Chemistry Analysis 2
Carbonates(negative ions)
Most carbonates are insoluble but some like sodium carbonate & potassium carbonate are soluble
They produce solutions containing carbonate ions
Acid +Carbonate→Salt+Water+Carbon Dioxide
Calcium Hydroxide+Carbon Dioxide → Calcium Carbonate+Water
Halides
If silver nitrate solution is added to sample of dilute nitric acid & halide ions,the silver halide is precipitated
Silver Chloride-White
Silver Bromide-Cream
Silver Iodide-Yellow
Sulfates
Barium chloride added to water/HCL with sulfate ions forms barium sulfate
Barium sulfate is insoluble so it forms a precipitate
Forms white precipitate
Pure Substances
Contain only one type of atom
Pure elements melt/boil at specific temperatures
E.g. Pure milk/water(nothing has been added to it)
Formulation
A mixture that has been designed to be used as a useful product
E.g.Paints,medicines,alloys,food,fertilisers
Instrumental Methods
Elements/compounds can be detected using machines
They are fast accurate & sensitive
E.g. Gas Chromatography(GCMS)
Mixture of compunds are vaporised
Gas is pumped through column
Column's heated up to speed the rate of separation
To identify compound,you need a mass spectrometer joined to gas spectrometer
Mass Spectrometer indentifies according to mass
E.g. Flame Emission Spectroscopy
Sample is put in a flame
Light given out is passed through a spectroscope
Output is a line spectrum that is analysed for metal ions and measure their concentrations
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