Aim from testing the hardness presence of iron fluoride chloride
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To test the total hardness, iron, fluoride and chloride etc. in different samples of water.
And if you need to write objective how to do this you can write :
If iron, fluoride, chloride etc. are present in water above permissible limits, they may cause several health problems. For example, if fluoride is present above permissible limit, people of the region may suffer from fluorosis. Hardness of water is due to the presence of calcium and magnesium ions. It is well known fact that hard water is not fit for laundary purposes. Thus, it is very important to know the ions and their amount present in water.
To test the total hardness, iron, fluoride and chloride etc. in different samples of water.
And if you need to write objective how to do this you can write :
If iron, fluoride, chloride etc. are present in water above permissible limits, they may cause several health problems. For example, if fluoride is present above permissible limit, people of the region may suffer from fluorosis. Hardness of water is due to the presence of calcium and magnesium ions. It is well known fact that hard water is not fit for laundary purposes. Thus, it is very important to know the ions and their amount present in water.
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