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Experiment 13: Single displacement reaction

Experiment 13: Single displacement reaction

Objective

Study an example of single displacement reaction

Materials required:

  • Zinc metal granules
  • Dil. sulphuric acid
  • red and blue litmus papers
  • test tubes
  • candle/ match

Procedure:

  • Take few zinc granules in a test tube.
  • Add about 10 mL of dil. sulphuric acid to zinc granule. Effervescence comes out from the reaction mixture, as shown in Fig.
  • Perform the tests as given in the observation table and record your observations.

Findings:

    Test
    Activity
    Observation
    Color
    Look at the colour of the gas liberated
    Colorless
    Smell
    Fan the gas gently towards your nose
    Odorless
    Litmus test
    Bring moist blue and red litmus papers
    near to the mouth of the test tube
    No change
    Combustion test
    Bring a lighted candle near to the
    mouth of the test tube
    Burn with pop sound

Conclusions:

  • Liberation of hydrogen confirms that Zinc has replaced hydrogen from sulphuric acid to form zinc sulphate and hydrogen

Theory:

  • Zinc metal reacts with dil. sulphuric acid and produces hydrogen gas.
    Zn (s) + H2SO4 (aq) --> ZnSO4 (aq) + H2 (g)
  • This is an example of a single displacement reaction of a non-metal by a metal.

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