Joshua Psalms T. answered • 05/28/16
Tutor
5
(5)
Civil EIT, Former College Professor of Mathematics (in Asia)
molarity = mol/volume
9 = 50/volume
volume = 50/9 L
molality = mol/mass
10 = 50/mass
mass = 5 kg
density = mass/volume
density = 5/(50/9) = 0.9 kg/L (Just tweak it if you need other units)
Ritwika B.
The answer is 1.35g/ml . it is wrong actually. I have done like this.
Density of liquid= d g/ml
Density of solution= D g/ml
Density of solvent = 1g/ml
V=1 L (assume)
Mass of solute= m g
Mass of solvent= M g or M/1000 kg
No.of moles of solute = m/50
Therefore, m/50*1 = 9
Or M = 450 g
Volume of solute=450 ml = 45/1000 L
Volume of solvent= M ml = M/1000 L
Therefore,
9/(M/1000) =10 or M= 900g
Volume of solvent= 0.9L
Mass of solution= M+M = 1350
Hence, density= 1350/1000 = 1.35g/ml
Report
05/29/16
Ritwika B.
05/29/16