September 18, 2021, 06:35:53 AM
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### Topic: Concentration and Mass %  (Read 125 times)

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#### yoyohs

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##### Concentration and Mass %
« on: September 12, 2021, 11:34:13 AM »
What is the concentration (in mol/L) of a 23.0 mass % aqueous solution of Br2 that has a density of 1.325 g/mL?

I tried dividing the mass % by the molar mass of Br2 to get the number of moles. Then I used 23 as the mass to calculate volume from the density formula. I used this volume in the concentration formula to find concentration. The answer I got is wrong, so I want to know where I went wrong and how I can fix this.

#### Orcio_Dojek

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##### Re: Concentration and Mass %
« Reply #1 on: September 12, 2021, 12:09:26 PM »
1. Calculate mass of 1 liter of the solution.
2. Calculate mass of Br2 in 1 liter of the solution.
3. Convert mass to quantity (number of moles).