Question

a student needs to prepare 250 ml of a 0.650 m aqueous solution of sucrose, c12h22o11(aq), which is used frequently in biological experiments.

Answer 1

To prepare 250 ml of a 0.650 M aqueous solution of sucrose (C12H22O11), the student needs to determine the amount of sucrose to add to the solution. The concentration (C) of a solution is given by the formula:

C = m/V

where m is the mass of solute and V is the volume of the solution. To find the mass of sucrose, we can rearrange the formula:

m = C * V = 0.650 M * 250 ml = 162.5 g

So, the student needs to add 162.5 g of sucrose to 250 ml of water to make a 0.650 M aqueous solution of sucrose. The solution can then be stirred to ensure complete dissolution of the sucrose