Asked by minerva
if a 10cm cube pipette were not available, which one of the following would be the best way of measuring a 10cm cube portion of a solution?
a. weigh 10 times the mass of 1cm cube of the solution.
b. weigh 10g of the solution.
I think this is a trick question. There seems to be no difference in the two answers; however, a is the correct answer. If you know the mass of 1 cc then 10x that will be the mass of 10 cc. But the mass of 1 cc of the solution, due to the temperature and density differences, may not be 1 g and 10 g may not be 10 cc. I think the unknown density of the solution is the trick part.
but if the solution is pure water, then the two answers should be both correct?
a. weigh 10 times the mass of 1cm cube of the solution.
b. weigh 10g of the solution.
I think this is a trick question. There seems to be no difference in the two answers; however, a is the correct answer. If you know the mass of 1 cc then 10x that will be the mass of 10 cc. But the mass of 1 cc of the solution, due to the temperature and density differences, may not be 1 g and 10 g may not be 10 cc. I think the unknown density of the solution is the trick part.
but if the solution is pure water, then the two answers should be both correct?
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