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Illustrate how boiling can be used to soften hard water

Illustrate how boiling can be used to soften hard water

Answers

Raphael
Apparatus:
• Some water from a hard water source e.g. bore hole or a well.
• Source of heat
• A container e.g. aluminum sufuria
• A bar of soap
• Two basins

Procedure/ method:
• The water is divided into two equal amounts and some put in the aluminum sufuria and the other into the basin.
• The water in the aluminium sufuria is boiled, then poured into the other basin and allow it to cool.
• Use soap to lather with cool boiled water and the unboiled water.

Observations:
It may have been observed that the inside of the sufuria used to boil the water is stained. This is scale.

Conclusion:
When water is boiled, the mineral salts present in the water are broken and are deposited in the container used for boiling as scale and this way the water becomes soft. This is why it was found that it was easier to form lather with cool boiled water. This shows that boiling is a simple method of softening hard water.
raphael answered the question on October 9, 2018 at 04:47

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