The density of a H2SO4 solution is 2.98 g/mL. The molality of one litre solution of 98% of H2SO4 (weight/volume) is :
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Answer:
12.1
Explanation:
Density of acid soln = 1.8 g/ mL.
1000 mL volume will weight 1800g.
Mass of H2SO4
present =1800× 100/ 90
=1620g
Number of mole of H2SO4
= molar mass/ actual mass
= 98/ 1620
=16.53 mol
Thus molarity of stock solution is 16.53 M.
To prepare 1000 mL of 0.2 M solution,
M 1 V 1 = M2 V2
16.53× x =0.2 × 1000
x= 16.53/ 200
x=12.099 ml
x=12.1 ml
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