First slide
Sodium Chloride

Statement -I : Common salt is deliquescent

Statement-II: Solubility of NaCl increases with increase in temperature


Pure NaCl is not deliquescent. CaCl2 and MgCl2 present as impurities in NaCl are responsible for deliquescence;

Hsolution =Hhydration(exothermic)+Hlatticeenthalpy(endothermic) For Nacl dissolved in H2O Hhydrationethalpy(-784 kJ)Hlatticeenthalpy(+788 kJ)

Hsolution=+4 kJ =+1 k cal

Hsolutionis almost negligible.(almost zero)

solubility of NaCl in water  almost remains constant with change in temperature


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