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Solutions

Question
CBSEENCH12010875

18 g of glucose (C6H12O6) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100o C is

  • 759.00 Torr

  • 7.60 Torr

  • 76.00 Torr

  • 752.40 Torr

Solution

C.

76.00 Torr

fraction numerator straight P to the power of straight o minus straight P subscript straight s over denominator straight P subscript straight s end fraction space equals space straight n over straight N
fraction numerator 760 minus straight P subscript straight s over denominator straight P subscript straight s end fraction space equals space fraction numerator begin display style 18 over 180 end style over denominator begin display style fraction numerator 178.2 over denominator 18 end fraction end style end fraction space equals space fraction numerator begin display style 1 over 10 end style over denominator 9.9 end fraction space equals space fraction numerator 0.1 over denominator 9.9 end fraction
760 space minus space straight P subscript straight s space equals space 1 over 99 straight P subscript straight s
760 space straight x space 99 space minus space straight P subscript straight s space straight x space 99 space equals space straight P subscript straight s
760 space straight x space 99 space equals space 100 space straight P subscript straight s
space straight P subscript straight s space equals space fraction numerator begin display style 760 space straight x space 99 end style over denominator 100 end fraction space equals space 752.4