MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryMole _ Equivalent ConceptStrength of Solution
An antifreeze mixture contains 40% ethylene glycol (C₂H₆O₂) by weight in the aqueous solution. If the density of this solution is 1.05 g/mL, what is the molar concentration?
A.6.77 M✓ Correct
B.6.45 M
C.0.0017 M
D.16.9 M
Explanation
Consider 100g of solution. Mass of ethylene glycol = 40g Moles of ethylene glycol 40 0.645 62 Volume of solution 100 95.24 1.05 Mass Density ml 3 95.24 10 x L Molarity 3 3 0.645 0.645 10 6.77 95.24 10 95.24 x x The correct option is 6.77M
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