Sucrose, solution preparation 2.5 molar

A sucrose solution was prepared by dissolving 13.5 g C12H22O11 in sufficient water to make exactly 100 mL, which was then found to have a density of 1.050 g/mL. Compute the molar concentration and the molality of the solution. 

Now that you know how to calculate the molarity of a solution, how do you think you would prepare 1 L of a 1.50M aqueous solution of sucrose (C12H22O11) for an experiment A 1.50M aqueous solution of sucrose contains 1.50 moles of sucrose dissolved in a liter of solution. The molar mass of sucrose is 342 g. Thus, 1.50 moles of sucrose has a mass of 513 g, an amount that you can measure on a balance. 

Calculate the expected vapor pressure at 25°C for a solution prepared by dissolving 158.0 g common table sugar (sucrose, molar mass = 342.3 g/mol) In 643.5 cm of water. At 25°C, the density of water Is 0.9971 g/cm and the vapor pressure Is 23.76 torn... 

Using the value of a determined above, the results of the standard assay made initially to check the enzyme activity, the assay in part C, and the given concentration of the enzyme stock solution in g L , calculate the specific activity of the enzyme— that is, the number of micromoles of sucrose hydrolyzed per minute per gram of enzyme present. (The specific activity of an enzyme preparation is of course a function of the purity of the enzyme. As inactive protein is removed from the preparation, the specific activity will rise. When the specific activity can no longer be increased by any purification method, a homogeneous enzyme preparation may have been achieved but proof of this depends on other criteria.) The exact chemical composition of invertase is still unknown, but its molar mass has been estimated at 100,000 g mol Combining this datum with your calculated specific activity, estimate the turnover number for the enzyme. 

A solution is prepared by dissolving 125 g of sucrose, CnHiiOi i, in enough water to produce 1.00 L of solution. What is the molarity of this solution ... 

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