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| boiling | distillation | aeration | infrared |
| sodium | suspended impurities | minerals | ion-exchange resin |
| typhoid | potash alum | Clark’s method | sulphates |
1.
The \(Ca\) and \(Mg\) salts in water determine the .
2.
Potash alum particles react with to settle them more quickly.
3.
The process of converts calcium hydrogen carbonate into insoluble calcium carbonate.
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