water 2

What are the three methods used to separate temporary and permanent hardness from water?

why is distillation of water not feasible on larg scale?

• too costly

• requires a large amount of energy to function

• has a slow output of product

• all of the above

washing soda is known chemically as..

• hydrated sodium carbonate

• sodium carbonate

• sodium

• caronate

ion exchange is ..

• the removal of ions that cause hardness only

• the removal of ions that cause hardness and replace them with ions that do not cause hardness

• none of the above

..... swaps the calcium and magnesium ions in the water for sodium ions.

• deionised water

• resin

• An ion exchange resin

• distilled water

Eventually the resin loses all its Na+ ions, and it needs to be replenished by passing concentrated NaCl solution through it.

• True

• False

• I have no idea

Deionised water is water that contains ions

• True

• False

Distilled water is the purest form of water as all dissolved and suspended solids as well as dissolved gases have been removed from the water

• True

• False

Deionized water is not as pure as distilled water as deionized water normally contains ... and ...

• Dissolved gases only

• dissolved gases and non-ionic material

• non-ionic material only

• none of the above

Provides calcium for healthy teeth and bones

• true

• false