Tests for Gases

Test for Anions

Test for organic functional groups

Precipitation Reaction, Solubility and Thermal Decomposition

Experiment Techniques

Safety Issues

Testing reactivity of primary, secondary, tertiary compounds

• Three test tubes are set up containing three bromobutanes from primary to tertiary with 1 cm3 of ethanol as sovlent , then add 1cm3 of silver nitrrate solution and shake the tubes. Tertiary halogenoalkane is the fastest to turn cloudy.

• Preparation of halogenoalkane:

• Test for Group 7
• Unreactive Nichrome/platinum wire is dipped into the sample of mixture of HCl and salt (Concentrated HCl is used because chlorides are soluble and volatile) and hold the coated wire in a hot blue bunsen flame
• Methyl orange indicator goes from yellow alkali to red in acid - orange end point | phenolphthalein from pink to colourless in acid