A compound of sodium does not give CO_(2) when heated but it gives CO_(2) when treated with dilute acids. A crystalline compound is found to have 37.1% Na and 14.52% H_(2)O. Hence, compound is

A compound of sodium does not give CO_(2) when heated but it gives CO_

1.	A compound of sodium does not give CO_(2) when heated but it gives CO_(2) when treated with dilute acids. A crystalline compound is found to have 37.1% Na and 14.52% H_(2)O. Hence, compound is
Answer» `NaHCO_(3)10H_(2)O` `NaHCO_(3)5H_(2)O` `Na_(2)CO_(3)10H_(2)O` `Na_(2)CO_(3)H_(2)O` Solution :`CO_(2)` is obatined only when the compound is decomposed by acid thus, it is `Na_(2)CO_(3)`. It cannot be `NaHCO_(3)` since, it given `CO_(2)` on heating. Probable compound is `Na_(2)CO_(3).xH_(2)O` `{:(,,"MOLAR RATIO","Ratio"),(Na_(2)CO_(3),85.48,0.8064,1),(H_(2)O,14.52,0.8064,1):}` Thus, compound is `Na_(2)CO_(3)*H_(2)O` MOLECULAR WEIGHT `=124" g "mol^(-1)` percentage of sodium `=(2xx23)/(124)xx100=37.1%`