The two ions responsible for hardness in water are
-
A.
Ca(^{2+}) and / or Mg(^{2+}) -
B.
K(^+) and / or Mg(^{2+}) -
C.
Ca(^{2+}) and / or Li(^+) -
D.
Ca(^{2+}) and / or Na(^+)
Correct Answer: Option A
Explanation
There is an explanation video available below.