Question

The recipe say to make 600 ml of a 3 M scurose solution. The chemical formula for sucrose is C12H22O11.

1. How many moles of sucrose will you need?

2. What is the gram formula mass of sucrose (just round each mass to one decimal place)

3. How much table sugar will you weigh out?

4. How much water will you need?

Answer 1

1.

moles of sucrose = Molarity x volume in liters

volume given = 600 mL convert in to liters = 600 / 1000 =0.6L

moles = 3 mol / L x 0.6 L = 0.18 mol

2.

gram formula of sucrose

= 12 x C atomic mass + 22 x H atomic mass + 11 x oxygen atomic mass

= 12 x 12.0 g/mol + 22 x 1.0 g/mol + 11 x 16.0 g/mol

= 342 g/mol

3.

remember sucrose is nothing but a table sugar

mass = moles x gram formula of the mass

= 0.18 mol x 342 g/mol

= 61.56 g

4.

water we have to take 600 mL