Question

Arya performs an experiment in which she takes a rice grain sized piece of sodium metal and
lets it react with oxygen in a gas jar. After the reaction has taken place, she adds a little water to
it. Now, she takes a dropper and pour a few drops of this solution on a red litmus paper,pH paper
and a blue litmus paper. What changes will she observe in the above mentioned paper strips and
why?

Answer 1

Answer:

While performing both experiments, foam will be formed.

While performing both experiments, foam will be formed. In Set I we will have more length of foam because it consist of soft water. It's because,

While performing both experiments, foam will be formed. In Set I we will have more length of foam because it consist of soft water. It's because, In Set II we will have less foam because it consist of hard water due to the presence of CaSO4. The addition of Calcium salt makes the distilled water hard and leads to the formation of scum. Soaps don't react efficiently in hard water.

Explanation:

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