Name 3 methods of water softening?
why do drivers have to come to the surface slowly after completing a dive.
what natural processes can add oxygen to water.
what is the function of CaO in water purification.
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Water softening: distillation, water softener using salts and replacement reaction, boiling(of some help)
Divers surface slowly to avoid getting the "bends", caused by nitrogen in the air tank dissolving into their blood because of the pressure change
Oxygn is added to water as it bubbles over the rocks in a stream. Fountains, bubblers,waves
CaO helps smal particles settle in water purification