Question #16038

10. The pharmacist has asked you to weigh out 20 grams of menthol and dissolve it in sterile water to make a 5% solution. Later you are asked to change the concentration to a 1% solution to fill an order that was just received. What will the final volume of a 1% solution be?

Expert's answer

We need

M = 20[g]/0.01 = 2000[g]

of water to make 1% solution (no matter that we had 5% solution before). If the menthol is completely water soluble then the final volume will be 2 litres.

M = 20[g]/0.01 = 2000[g]

of water to make 1% solution (no matter that we had 5% solution before). If the menthol is completely water soluble then the final volume will be 2 litres.

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