What is permanent hardness of water?
How can it be removed
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there is voltage change when current through a circuit changes as u know that voltage is current cross resistance so its simple that resistance is constant but current changes cases voltage change ?
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Methods to remove permanent hardness - definition
Methods to remove permanent hardness - definitionWashing soda process: Hard water is treated with a calculated amount of washing soda when chlorides and sulphates of calcium and magnesium present in hard water get precipitated as insoluble calcium and magnesium carbonates which can be filtered off.
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