Name the sodium compound which is used for softening hard water
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mainly there are three sodium compounds which can remove permanent hardness of water: 1) washing soda ( sodium carbonate) 2) sodium hexametaphosphate (Na6 P6 O18) commercially called 'calgon '. 3) hydrated sodium aluminium silicate also known as sodium Zeolite / permutit. used in ion exchange method .
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Washing soda (i.e., sodium carbonate).
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