Carsyn E.

asked • 02/29/24

Using molarity to find solute moles and solution volume

Calculate the volume in milliliters of a 0.724M aluminum sulfate solution that contains 75.0mmol of aluminum sulfate Al2SO43. Be sure your answer has the correct number of significant digits.

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David K. answered • 02/29/24

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Molarity = moles/volume(L)

When you rearrange it for volume you get:

Volume(L) = moles/Molarity

In this case the number of moles is in milliMoles do the volume will be in milliLiters

V= 75.0mmol /0.724M = 103.6 mL

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J.R. S.

tutor
How can you mix mmoles and moles. I think your answer is incorrect.
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02/29/24

David K.

While in general you shouldn't mix the units, in this case I simply saved a couple of steps to convert the mmoles to moles and then the liters to mL. I did notice that I missed a decimal point, so thank you for making me double check my work.
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02/29/24

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