Why would it be important to place the same amount of a solution in the polarime

Question

Why would it be important to place the same amount of a solution in the polarimeter tube when measuring optical rotation as the amount of solvent when measuring theblank?

a. So the path length can be easily converted to mL'?s when calculating optical rotation.

b. Biot?s law, used to calculate optical rotation, requires that the volume of the blank be subtracted from that of the solution to arrive at a proper density value.

c. So the density of the blank can be added to that of the solution when calculating optical rotation.

d. Only a certain volume of liquid can be placed in a polarimeter tube.

e. None of the answers shown are correct.

Explanation / Answer

Why would it be important to place the same amount of a solution in the polarimeter tube when measuring optical rotation as the amount of solvent when measuring theblank? a. So the path length can be easily converted to mL'?s when calculating optical rotation.

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