Water Testing

Aim: H2S Strip Test Learning, and calculating whether water is potable or not.

Materials: H2S Strip Test Bottle, Water Sample.

Process: Take 100ml of water sample.
               Fill the chemical till the marked level add the 100ml water sample.
               After filling the mixture close the bottle tightly and mix it slowly.
               Keep the bottle in a cool shady place.
               It takes 48 hours for the colour to change.

Observation: If the colour changes to blackish the water is not potable.

                       If the colour changes to yellow the water is potable.