Question

0.2 gram of substance A dissolved in 200 ml gives the same osmotic pressure is 0.3 gram of the substance B in 200 ml which of the two substance is a or b have the higher molecular weight

Answer 1

Answer:

we know that

moles =weight/mol.wt=vol/22.4

for substance A

0.2/mol.wt=0.2/22.4

molwt=0.2×22.4/0.2

=22.7

for substance B

0.3/mol.wt=0.2/22.4

molwt =33.7

b has higher mol .wt than a