Method to Remove Temporary Hardness of Water

There are various methods to remove temporary hardness of water. Some of the most common methods are:

1. Boiling Method
Boiling is the most traditional and easiest method to remove temporary hardness from water. When hard water is boiled, the bicarbonates present in the water decompose to form carbonate, water and carbon dioxide. The carbonate precipitates out of the water leaving it soft.

2. Lime-soda Method
The lime-soda method is another popular way to remove temporary hardness of water. In this method, calcium and magnesium ions present in the water are precipitated out by adding lime (Ca(OH)2) and soda (Na2CO3) to the water. The precipitate is then filtered out, leaving the water soft.

3. Ion-exchange Method
The ion-exchange method is a modern and effective way to remove temporary hardness of water. In this method, water is passed through an ion-exchange resin, which contains sodium ions. The resin exchanges the sodium ions for the calcium and magnesium ions in the water, leaving it soft.

4. Synthetic Resins Method
The synthetic resins method is similar to the ion-exchange method, but it uses synthetic resins instead of natural ones. These resins have a higher exchange capacity and are more efficient at removing hardness from water.

Conclusion
All the above-mentioned methods are effective in removing temporary hardness of water. The choice of method depends on the type and amount of hardness present in the water, as well as the cost and availability of the method. It is important to choose the right method to ensure that the water is safe for consumption and does not cause any harm to the environment.