# Chemical Forums

## Chemistry Forums for Students => High School Chemistry Forum => Topic started by: cell_491 on April 24, 2005, 08:39:01 PM

Title: how to calculate the molality of a solid solution (alloy for example)
Post by: cell_491 on April 24, 2005, 08:39:01 PM
heres an exmple of the type of problem im stumped on
what is the molality of a solid solution containing .125g of chromium and 81.3g of iron?
(the answer is .0296m but i have to show work and i dont know how to do it  ???)
Title: Re:how to calculate the molality of a solid solution (alloy for example)
Post by: Mitch on April 24, 2005, 08:45:41 PM
First things first.

Molarity is moles/volume

Have you manipulated your given information into something that has units of either volume or moles?
Title: Re:how to calculate the molality of a solid solution (alloy for example)
Post by: cell_491 on April 24, 2005, 08:50:33 PM
allright i got .0024mol of Cr and 1.455mol of Fe
Title: Re:how to calculate the molality of a solid solution (alloy for example)
Post by: cell_491 on April 24, 2005, 08:58:47 PM
nvm i figured it out the equation is .125g/52g/(81.3g/1000)= .0296m
Title: Re:how to calculate the molality of a solid solution (alloy for example)
Post by: AWK on April 25, 2005, 02:16:31 AM
MOLALITY - moles per kg of solvent