A) \[{{(RCOO)}_{2}}Ca\]
B) \[{{(RCOO)}_{2}}Mg\]
C) Both [a] and [b]
D) None of these
Correct Answer: C
Solution :
Hardness in water is due to dissolved sulphates, chlorides and bicarbonates of calcium and magnesium. When such type of water is used for cleaning clothes with soap (i.e., sodium stearate) a curdy precipitate of calcium and magnesium salts are formed. \[\underbrace{RCOONa}_{soap}+\underbrace{C{{a}^{2+}}or\,M{{g}^{2+}}}_{in\text{ }hard\text{ }water}\xrightarrow{{}}\] Cardy precipitate \[{{(RCOO)}_{2}}Ca\] or Mg.
You need to login to perform this action.
You will be redirected in
3 sec
