A chemist prepares a solution of calcium bromideCaBr2by measuring out38.μmolof calcium bromide into a150.mLvolumetric flask and filling the flask to the mark with water.Calculate the concentration inμmol/L of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits.

Question
Asked Oct 13, 2019
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A chemist prepares a solution of calcium bromide

CaBr2

by measuring out

38.μmol

of calcium bromide into a

150.mL

volumetric flask and filling the flask to the mark with water.

Calculate the concentration in

μmol/L

 of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits.

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Expert Answer

Step 1

The mole of calcium bromide in 150mL is 23.8*10-6moles.

The conc...

23.8x10-moles
Concentration
= 0.1 59x10~'mol/L
150x10-3L
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23.8x10-moles Concentration = 0.1 59x10~'mol/L 150x10-3L

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