SOLUTIONS [ XII ]

                        YASH  CLASSES

    

                          Solutions

 1. Calculate the molality and mole fraction

     of 2.5g of ethanoic acid in 75of benzene.

 2. Calculate the molarity and normality of a

    solution    containing   5g   of   NaOH  in

    450ml solution .

 3. Calculate the molarity and normality of a

     solution    containing   9.8g   of  H₂SO₄  in

    250cm³ solution .

 4.  Calculate the molarity and  molality of a 15%

     solution of H₂SO₄  [ density of H₂SO₄ = 1.020

     g cm-³ ].

 5. A solution contain 25% water , 25%  ethanol  

    and  50%  acetic acid by mass . Calculate  the

    mole fraction of each component.

 6. Calculate the molality of H₂SO₄  solution in

     which the  mole fraction of H₂O  is  0.85 .

 7. A solution of ethanol in water is 1.54 molal .

    How many grams of it are there in 2500g  of

     solvent ?

 8. 20ml of 10N HCl are dilute with distilled 

     water to form one litre of the solution what

      is the normality of the diluted solution .

 9. What is  mole  fraction  of  a  solute  in

      2.5 m  aqueous solution.