Solutions Question 186
Question: The molality of 90% $ H_2SO_4 $ solution is [density=1.8 gm/ml] [MP PMT 2004]
Options:
A) 1.8
B) 48.4
C) 9.18
D) 94.6
Show Answer
Answer:
Correct Answer: C
Solution:
The density of solution $ =1.8,gm/ml $ Weight of one litre of solution $ =1800,gm $
$ \therefore $ Weight of $ H_2SO_4 $ in the solution $ =\frac{1800\times 90}{100} $ =162gm
$ \therefore $ Weight of solvent $ =1800-1620=180,gm $
$ \therefore $ Molality $ =\frac{1620}{98}\times \frac{100}{180}=9.18 $
