Weigh the beaker.

2

Add 50 milliliters of the solution you want to test to the beaker and record its mass. The mass of the solution is equal to the total mass minus the mass of the beaker.

3

Divide the mass of the solution by its volume -- in this case, 50 milliliters -- to find its density.

4

Empty, rinse and dry the beaker. Add 4.3 grams of sugar to the empty beaker, then add water until the contents reach 50 milliliters in volume. Stir until the sugar dissolves, then measure the mass of the sugar solution and its volume. Divide mass by volume to find density and record this figure.

5

Repeat this process, but now using 8.6 grams of sugar instead of 4.3; again, record the density. Repeat the process again with 17.1 grams