Question

gypsum reacts with sodium hydroxide

Answer 1

Answer:

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Explanation:

To make this, mix 15 gram bleaching powder with 100 ml (half glass) water and keep for 15-20 minutes. ... To purify drinking water from bacteria, add 8 drops (0.5 ml) of chlorine solution in 1 litre of water to purify it. Two tea spoons of chlorine solution (10 ml) could be used in 20 litre water.

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