Problem: Calculate the molarity of an aqueous solution that is 8.1% by mass calcium chloride. You might need to know that the density is 1.10 g/mL. 

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We’re being asked to determine the molarity of an aqueous solution that is 8.1% by mass calcium chloride


Mass or weight percent (% by massis the percentage of a given element or compound within a solution. The equation used to calculate for mass percent is shown below:


mass percent = mass componenttotal mass×100


Recall molarity (M):                

M = mol soluteL solution

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Problem Details

Calculate the molarity of an aqueous solution that is 8.1% by mass calcium chloride. You might need to know that the density is 1.10 g/mL. 


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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent. Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems.