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An aqueous sol is 1.00m molal in KI Which change will cause vapour pressure of the sol to increase? (a) addition of NaCl                                     (b) addition of 1.00m molal KI                   (c) addition of water  Pls provide reason for why and (c) is correct !! And also pls mention that why option (b)  is not correct !!   And the reason I have assumed  for which option (a)   is wrong is that - NaCl  is non volatile and so adding it will decrease vapour pressure so am I right  ??     
Asked by charvipareek057 | 19 Apr, 2019, 08:32: AM
answered-by-expert Expert Answer
A d d i t i o n space o f space e l e c t r o l y t e s space l i k e space N a C l divided by K I space e l e v a t e s space t h e space b o i l i n g space p o i n t comma space t h e r e b y space r e d u c e s space t h e space v a p o r space p r e s s u r e. t h i s space c a n space b e space c o n c l u d e d space b y space t h e space f o r m u l a space bold increment bold italic T subscript bold b bold space bold equals bold italic i bold italic K subscript bold b bold italic m space w h e r e space i space i s space t h e space v a n t space H o f f space f a c t o r space h e r e space t h e space v a l u e space i s space 1 space sin c e space s t r o n g space e l e c t r o l y t e s space a r e space t a k e n. A d d i t i o n space o f space w a t e r space m a i n t a i n s space t h e space b o i l i n g space p o i n t space a r o u n d space 100 to the power of 0 C space s o comma space i n c r e a s e s space t h e space v a p o r space p r e s s u r e. Y o u r space a s s u m p t i o n space i s space c o r r e c t space a b o u t space t h e space v o l a t i l i t y space o f space t h e space e l e c t r o l y t e space i n c r e a sin g space v a l u e space o f space v o l a t i l e space c h a r a c t e r space a l s o space i n c r e a s e s space t h e space v a p o r space p r e s s u r e H e n c e comma space c o r r e c t space a n s w e r space i s space o p t i o n space c.
Answered by Sumit Chakrapani | 20 Apr, 2019, 02:00: PM

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