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Explain why the molar mass of nacl as observed by using colligative property measurements is half of the calculated value |
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Answer» - COLLIGATIVE PROPERTY CONCEPT :- NaCl molecule dissociates in AQUEOUS solution. in such case ( Van't hoff's factor)i = So, in case of NaCl i = 1/2 ( as it dissociates into Na+ and Cl-)Now, i also EQUALS = Since, i = 1/2Thus, normal molar mass × 2 = calculated molar mass.Hence, molar mass of NaCl is half the calculated molar mass. |
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