What would be the molality of c2h5oh in the water solution which is - ProProfs Discuss
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What would be the MOLALITY of C2H5OH in the water solution which is prepared by mixing 50.0 mL of C5H2OH with 100.0 mL of H2O at 20oC?
The density of the C2H5OH is 0.789 g/mL at 20oC.



A. 0.086 m
B. 0.094 m
C. 1.24 m
D. 8.56 m
E. None of these

This question is part of Solutions Quiz 2
Asked by Pszpila, Last updated: Apr 18, 2019

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2 Answers

W. Pratt

Want to learn new things and share my knowledge

W. PrattMarketing Analyst, MBA, Lincoln
Marketing Analyst, MBA, Lincoln

Answered on Apr 18, 2019

The correct answer to this question is D, 8.56m. Also known as molal concentration, molality is a measurement, which measures a solute's concentration. It is measured in terms of the amount of the substance in the mass of the solvent. mol/kg is the unit for molality.

The earliest recorded discovery of this measurement is by chemists G.N. Lewis and M. Randall, through their 1923 publication Thermodynamics and the Free Energies of Chemical Substances. Molality can be measured by mulitplying the number of grams by 1 kilogram over 1,000 grams. This question would normally be found on science tests, specifically in a chemistry course.

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John Smith

John Smith

Answered on Dec 12, 2016

8.56 m
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