Answer on Biochemistry Question for Chanel
a) Show how you would prepare 400 ml of a 0.2% NaCl solution?
b) Would the above solution be hyper-, iso-, or hypo-osmotic to a 80mM NaCl solution?
a) For preparation of 400 ml of 0.2% solution we need to calculate the mass of NaCl that we add to the water what is the solvent.
density of the solution = 1.8 g/ml =>
[NaCl]=0.002*(1.8/58.5)=0.000062 M = 0.062 mM =>
m/(M*V)=0.000062 M => m=0.0015 g.
b) Using concentration calculated above we can say the above solution would be hypo-osmotic.
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