Posted by kaksha on .
The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step .
Molar mass of ethanol = 46.07
60% (m/m)=60g of ethanol out of 100g in solution.
60g of ethanol*(1 mole/46.07g)= moles of ethanol
Solving for volume,
Total volume=100g total solution/0.8937g/ml
Molarity=moles/volume in L
Molarity of ethanol solution=moles of ethanol/Total volume*(10^-3)
It could be an easier way to do this, I just cant think of it at the moment.
One other thing, your answer should only have 2 significant figures.