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Concentration Questions
!
How many grams of glucose would be dissolved to make 1 liter of a 0.5M glucose solution?
0.5 mole/liter x 180 grams/mole x 1 liter = 90 g
!
How many molecules of glucose are in that 1 liter of 0.5M glucose solution?
0.5 mole/liter x 1 liter x 6.023x10
23
molecules/mole = 3.012x10
23
molecules
!
What is the concentration of the 0.5M glucose solution expressed in mM?
0.5 mole/liter x 1000 mmoles/mole = 500 mM
!
What is the concentration of the 0.5M glucose solution expressed in %?
0.5 mole/liter x 180 grams/mole x 1 liter/1000ml = 0.09 g/ml = 9 g/100ml = 9%
!
How many grams of sucrose would be dissolved in 1 liter of a 0.5M sucrose solution? How does that
compare to the grams of solute in the 0.5M glucose solution?
0.5 mole/liter x 342 grams/mole x 1 liter = 171 g = almost twice as many grams
!
How many molecules of sucrose in that 1 liter of 0.5M sucrose solution? How does that compare to the
amount of solute in the 0.5M glucose solution?
0.5 mole/liter x 1 liter x 6.023x10
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 Spring '10
 Heyer
 molecular biology, Glucose

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