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(a) Complete the following equations : ...

(a) Complete the following equations :
(i) `nCH_(2) = CH_(2) rightarrow………..`
(ii) `CH_(3)COOH - NaHCO_(3)rightarrow …….+……+…….`
(b) What is the cause of hardness of water? Why soap does not form lather with hard water? Mention the disadvantage of cleaning clothes with soap in hard water?

Text Solution

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(a) (i) `nCH_(2)=CH_(2)rightarrow(-CH_(2)-CH_(2))_(n)`
(ii) `CH_(3)-COOH+NaHCO_(3)rightarrowCH_(3)H_(2)O+CO_(2)-COONa^(+)`
(b) Presence of `Ca^(2+)` ions and `Mg^(2+)` ions.
Formation of insoluble calcium and magnesium salts with soap.
Soap gets wasted simply as it does not form lather with soap.
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