Problem: A throat spray is 1.40% by mass phenol, C6H5OH, in water. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution.

🤓 Based on our data, we think this question is relevant for Professor Capps' class at American Public University System.

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FREE Expert Solution

molarity (M)=moles soluteL solution


% Mass=mass of phenolmass of solution


Assume 100 g of solution → 1.40 g phenol


1.40%=1.40 g phenol100 g solution



Calculate moles phenol:

molar mass phenol = 94.11 g/mol


moles phenol=1.40 g phenol×1 mol phenol94.11 g phenol

moles phenol = 0.01487 mol



Calculate volume solution:

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Problem Details

A throat spray is 1.40% by mass phenol, C6H5OH, in water. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution.

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Based on our data, we think this problem is relevant for Professor Capps' class at American Public University System.

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Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.