Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.5 g of ascorbic acid dissolved in 210 g of water has a density of 1.22 g/mL at 55∘C.A) Calculate the mass percentage of ascorbic acid in this solution.Express the mass percentage to three significant digits.B) Calculate the mole fraction of ascorbic acid in this solution.Express the mole fraction to three significant digits.C) Calculate the molality of ascorbic acid in this solution.Express the molality in moles per kilogram to three significant digits.D) Calculate the molarity of ascorbic acid in this solution.Express the molarity to three significant digits.

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Asked Feb 20, 2019
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Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.5 g of ascorbic acid dissolved in 210 g of water has a density of 1.22 g/mL at 55∘C.

A) Calculate the mass percentage of ascorbic acid in this solution.
Express the mass percentage to three significant digits.

B) Calculate the mole fraction of ascorbic acid in this solution.
Express the mole fraction to three significant digits.

C) Calculate the molality of ascorbic acid in this solution.
Express the molality in moles per kilogram to three significant digits.

D) Calculate the molarity of ascorbic acid in this solution.
Express the molarity to three significant digits.

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Expert Answer

Step 1

Mass percentage of the ascorbic acid in the given solution may be determined as:

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Step 2

b) Number of moles = Given mass/ Molecular mass

Mole fraction of ascorbic acid in the given solution may be determined as:

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Step 3

c) Molality of a solution is defined as moles of the solute per kg of th...

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