# question 19(both question)

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Q4 . A solution contain substances A and B in H2O (solvent). The mole fraction of A is 0.05 and the molarity of B is 7M. The solution has density 1.14 gm/ml. Calculate molarity of A.
[Molecular weight of A = 10 gm/mol; molecular weight of B = 30 gm/mol]

Q5 . Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2 litre of 2 M Ag2SO4 is mixed with 4 litre of 1M  NaCl solution is [Ag2SO4 + 2NaCl --> 2AgCl + Na2SO4]

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