What is the molarity of a solution made by dissolving 0.911 g of ascorbic acid (C6H8O6, MM = 176 g/mole) in enough water to make 125 mL of solution? 1.28 M 0.0414 M 7.29 M 4.14 x 10^-5 M
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Ascorbic acid (vitamin C, C6H8O6, Mr = 176.1256 g/mol ) is a water soluble vitamin. A solution contains 50.5 g of ascorbic acid dissolved in 210 g water. The solution has a density of 1.022 g/ml at 55oC. 2.1 Calculate the mass percentage (%m/m), of the ascorbic acid in this solution. [3] 2.2 Calculate the molarity of this solution [3] 2.3 Ascorbic acid is a weak monoprotic acid, determine the pH of this solution. [4] Given: Ka= 7.9*10^-5 2.4 You wish to make a buffer with a pH of 4.55 from this solution. What mass of sodium ascorbate (NaC6H7O6, Mr = 198.1075 g/mol) must be added to the solution?
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