the hardness 10s litre of hard water was completely removed by passing through a zeolite softner . the bed on exhauston required of 500ml of Nacl solution of starin 25gm/litre, calculate hardnes.
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completely removed by passing through a zeolite softner . the bed on exhauston required of 500ml of Nacl solution of starin 25gm/litre, calculate hardnes.
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