Explain why -
(a) Soap cannot be used in hard water.
(b) Oil does not mix in water. However,
oil and water become homogeneous
if a sufficient quantity of detergent
is added. ol moleque wok ne
(c) Synthetic detergents are superior to
soap.
(d) Often coloured spots are formed on
clothes during washing. Corre
(e) Tobacco masheri should not be
used for cleaning teeth.
plz let me know that
Answers
Explanation:
(a) because it does not forms lather with hard water and gets wasted.
(c) because they do not form insoluble salts.
Answer:
a)Soaps cannot be used in hard water because they forms precipitates. ... These prevent the calcium and magnesium ions from reacting with the soap and allow it to form lather, thus forming precipitates.
b) it is because of density difference between the quantity. density of oil is less than water.. ... Now when detergent is added than it combinates the density difference and makes it homogeneous.
c)Synthetic detergents are better than soaps because if water contains calcium hydrogen carbonate (that is hard water), soaps will react with it and form insoluble salts, which cannot be used to clean clothes.
d) Yes, sometimes colored spots are formed on clothes during washing. It is due to color breed ( washing bright or dark color clothes with light color clothes ) , it forms color stains. If dark and light color clothes washed separately , chances of color stains will be reduced.
e) Tobacco has various kinds of negative effects on our body. It should not be used for cleaning teeths becuase it can harm the soft and hard tissues.