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Question
The sticky substance formed when soap is added to hard water is ______.
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Solution
The sticky substance formed when soap is added to hard water is scum.
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RELATED QUESTIONS
Give two examples for Deliquescent substance.
Give one word for the following statement:
A substance which does not contain water .
What are drying or desiccating agents? Give examples.
Complete the following table:
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Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
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Quick lime |
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|
Oil of vitriol |
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|
|
Washing soda |
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|
Solid caustic soda |
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Blue vitriol |
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What are hydrous substances? Explain with examples.
Name three methods by which hydrous substances can be made anhydrous.
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In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
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Deliquescent salt and hygroscopic salt
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
