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Mechanical Engineering Questions

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Hard Water is water with a large amount of calcium carbonate disolved within. When boiled, htis precipitates out to make an unpleasant - but tasteless - grit...it can flake off in large chunks.

Soft water is where there is no limescale disolved...although oither salts may be present.

 

Hard water can be converted to soft water for processing by the addition of sodium chloride (common table/rock salt) ot by distillation (or filterring too for that matter). It can also be easily idetified by its loss of surface tension when soap is added (ie it bubbles if its soft!)

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