Chemical Analysis
- Created by: MinMin3339
- Created on: 21-10-18 13:48
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- Chemical Analysis
- Ions
- Cations (+)
- Flame Tests
- Li+ : crimson red
- Na+ : yellow-orange
- K+ : lilac
- Ca2+ : orange-red
- Cu2+ : green
- Cu+ : blue
- Ammonium Ions: NH4+
- Litmus paper goes from blue to red to white
- Metal Ions
- Dilute NaOH is added and precipitate is formed
- Al3+ : white
- Excess : precipitate dissolves
- Mg2+ : white
- Excess : precipitate dissolves
- Cu2+ : blue
- Fe2+ : pale green
- Fe3+ : orange-brown
- Ca2+ : white
- Al3+ : white
- Dilute NaOH is added and precipitate is formed
- Flame Tests
- Anions (-)
- Carbonate Ions: CO32-
- HCl added
- Limewater
- Colourless to cloudy
- Limewater
- HCl added
- Sulfate Ions: SO42-
- Dilute HCl and BaCl2 is added and white precipitate is formed
- Halide Ions
- Dilute HNO3 and AgNO3 is added and precipitate is formed
- Cl- : white
- Br- : cream
- I- : yellow
- Dilute HNO3 and AgNO3 is added and precipitate is formed
- Nitrate Ions
- Dilute NaOH and Al is added and NH4 is produced
- Litmus paper goes from blue to red to white
- Dilute NaOH and Al is added and NH4 is produced
- Carbonate Ions: CO32-
- Cations (+)
- Gases
- H2
- Lit splint produces popping sound
- O2
- Glowing splint relights
- CO2
- Limewater turns cloudy
- NH4
- Red litmus paper turns blue
- Cl2
- Damp blue litmus paper turns red then bleaches white
- White starch-iodide turns blue-black
- H2
- Flame Emission Spectroscopy
- Comparison of a vaporised metal's spectrum with other reference spectra
- Ions
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