Quantitative analysis

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Created by
Elizabeth

Cards (6)

  • Explain the carbonate test?
    Add dilute nitric acid
    Positive results - bubbles of gas produces - CO2
  • Explain the sulfate test?
    Add dilute barium nitrate
    Positive result - white precipitate formed
  • What are the halide tests?
    Add silver nitrate
    Positive results:
    Cl2 - white precipitate
    Br2 - cream precipitate
    I2 - yellow precipitate
  • How can we differentiate between mixtures of halide ions?
    Add different concentrations of ammonia:
    AgCl - soluble in dilute NH3
    AgBr - soluble in concentrated NH3
    AgI - insoluble in concentrated NH3
  • What is the correct order of these tests?
    Carbontate, sulfate, halides
  • What is the test for ammonium ions (NH4)?
    Add aqueous sodium hydroxide (NaOH)
    Positive result - moist pH paper TURNS blue