Hardness of Water

The Reagent which is commercially known as ‘calgon’ that is used to remove the permanent hardness of water in Calgon’s method. Find out the number of moles of calgon required to remove 12 moles of Ca^(2+) ion present in hard water.

A water sample is said to contain permanent hardness if water contains

Permanent hardness in water due to presence of :

Which of the following ions will cause hardness in water sample?

Which anions produce permanent hardness in water?

Which anions produce permanent hardness in water?

Which of the following ions will cause hardness in water sample?

Give an equation for the removal of permanent hardness in water.

Which of the following substance produce hardness in water.

Assertion (A) : Temporary hardness in water is due to the presence of chlorides of magnesium. Reason (R) :Temporary hardness is removed by Clark's method.