You are assigned the task of separating a desired granular material with a density of 3.62 g/cm³ from an undesired granular material that has a density of 2.04 g/cm³. You want to do this by shaking the mixture in a liquid in which the heavier material will fall to the bottom and the lighter material will float. A solid will float on any liquid that is more dense. Using an Internet-based source or a handbook of chemistry, find the densities of the following substances: carbon tetrachloride, hexane, benzene, and diiodomethane. Which of these liquids will serve your purpose, assuming no chemical interaction takes place between the liquid and the solids?

Video transcript

Hi everyone today. We have a question telling us that two types of sand are to be separated using the difference in density. In the liquid sand A has a density of 1.21 g per centimeters cubed, and sand B has a density of 2.93 g per centimeter cubed. The two sand samples will be placed in a container and mixed well with the liquid. Upon settling, the denser materials will be at the bottom and the less dense material will float to the top. Given the following un reactive liquids in their densities, identify which one of them would be a good option for the separation. So for the separation we need a liquid that is denser than a and less dense than b. So if we look at liquid a. that works Liquid B 1.51 that works Liquid C 0 .95. That will not work because it is less dense than A. And d. That also works. So our answers here are A. B. Nd. Thank you for watching. Bye.