Answer the following Question
1. what will happen if we dip a red litmus paper in soap solution
2.Explain formation of scum in hard water
3.Suggest one method to remove permanent hardness of water
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1. if we dip red litmus paper in a soap solution it turns blue in colour as soap is a base.
2. in hard water due to presence of magnesium calcium ions the soap produces scum instead of lather which is a whitish slimy substance. the scum is also known as sodium stearate.
3. permanent hardness of water can be removed by washing soda.
2. in hard water due to presence of magnesium calcium ions the soap produces scum instead of lather which is a whitish slimy substance. the scum is also known as sodium stearate.
3. permanent hardness of water can be removed by washing soda.
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