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Introductory Chemistry: A Foundati...
ercise 15.3 Calculate the molarity of a solution prepared by dissolving I .00 g of ethanol. C2HOH. in enough water to give a final volume of 101 mL.
Interpretation:
The molarity of the solution which is prepared by 1.00 g of ethanol in enough water to give a final volume of 101 mL should be calculated.
Concept Introduction:
Molarity of the solution is equal to the ratio of number of moles of solute to the volume of solution in litres.
The mathematical expression is given by:
Molarity =
Number of moles =
Given information:
Volume of solution = 101 mL
Mass of ethanol (solute) = 1.00 g
First, calculate the number of moles of ethanol:
Number of moles =
Molar mass of ethanol = 46.07 g/mol
Put the values,
Number of moles =
Number of moles of ethanol =
The mathematical expression for molarity:
Molarity =
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