At T(K), 100 g of 98% H2SO4 (w/w) aqueous solution is mixed with 100 g of 49% H2SO4 (w/w) aqueous solution. What is the mole fraction of H2SO4 in the resultant solution ? (Given : Atomic mass H = 1 u

Question

At T(K), 100 g of 98% H2SO4 (w/w) aqueous solution is mixed with 100 g of 49% H2SO4 (w/w) aqueous solution. What is the mole fraction of H2SO4 in the resultant solution ? (Given : Atomic mass H = 1 u ; S = 32 u; O = 16 u) (Assume that temperature after mixing remains constant)

(A) 0.9
(B) 0.1
(C) 0.337
(D) 0.663

Prashant Kotian · Accepted Answer

Correct answer: D. ution is mixed with 100 g of 49% H2SO4 (w/w) aqueous solution. What is the mole fraction of H2SO4 in the resultant solution ? (Given : Atomic mass H = 1 u ; S = 32 u; O = 16 u) (Assume that temperature after mixing remains constant) (1) 0.9 (2) 0.1 (3) 0.337 (4) 0.663 Ans. (4) Sol. Total weight of H2SO4 = 100        + 100        = 147 gm Total weight of H2O = 200 – 147 = 53 gm Mole fraction of H2SO4 = 98 53 18        = 0.337

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