17. A compound 'X' of sodium is used for removing permanent hardness of water.
(a) Name the compound and write its chemical formula
(b) What happens when crystals of 'X' are heated? Write balanced chemical equation only.
(c) Write any two physical properties of X.
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(a) Sodium Carbonate Decahydrate
Chemical Formula- Na2CO3.10H2O
(b) Na2CO3.10H2O when heated give Na2CO3 + 10H20
(c)(1) used in glass, soap and paper industry
(2)used as a cleaning agent for domestic use
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