Hardness of water - Quiz 3

Fill in the blanks in the equations and statements below.

Temporary hardness can be removed by boiling.

Temporary hardness can be removed by Clark's process (the addition of slaked ).

Permanent (and ) hardness can be removed by the addition of washing .

(and temporary) hardness can be removed by ion-.

Permanent (and temporary) hardness can be masked by the use of polyphosphate water softeners.