TEACHING LABORATORY
VIRTUAL CHEMLAB
PERFORMANCE LABORATORY
 


V. Recording Observations

  1. Recording of observations must be done immediately after each test. DO NOT record 'roughly' or in a 'sketchy' manner wiht pencil and wait until the end of the practical to record all the observations properly in pen
  2. Any observations or conclusions written in pencil are NOT acceptable and NO martks would be given by the examiner
  3. All recording should be clear and concise; according to the style required by the examiner. Formulae when used should be written correctly.
  4. Always remember to record observations for tests for gases and name the gas
  5. Important observations include:
    1. Colour of solid/solution/precipitate
    2. Texture of solid
    3. Colour and odour of gas
    4. Test for gas
    5. Any effervescence occurring
    6. Solubility of solid or precipitate
    7. Colour changes when heating/cooling/when left standing int air
    8. Exothermic/endothermic reaction
    9. Colour of residue and filtrate

 

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