Vanillin, #C_8H_8O_3#, occurs naturally in vanilla extract and is used as a flavoring agent. A 39.1-mg sample of vanillin was dissolved in 168.5 mg of diphenyl ether, (#C_6H_5)_2O#. What is the molality of vanillin in the solution?

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Answer 1 · 2018-01-15T06:56:29

#"Molality"="Moles of solute"/"Kilograms of solvent"#

We get approx. #1.5*mol*kg^-1#

And so we set up the quotient....

#"Molality"=((39.1xx10^-3*g)/(152.15* g*mol^-1))/(168.5*mg*10^-6*kg*mg^-1)=??*kg*mol^-1#