A) \[N{{a}^{+}}\] and \[{{K}^{+}}\]
B) \[C{{a}^{2+}}\]and \[M{{g}^{2+}}\]
C) \[C{{a}^{2+}}\]and \[{{K}^{+}}\]
D) \[C{{a}^{2+}}\] and \[N{{a}^{+}}\]
Correct Answer: B
Solution :
Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of \[Ca\] and \[Mg\] on it. These \[C{{a}^{2+}}\] and \[M{{g}^{2+}}\] ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.
You need to login to perform this action.
You will be redirected in
3 sec
