Lesson: Determining PurityChemistry
In this lesson, we will learn how to determine the purity of a substance based on its proportion by mass and physical properties.
Sample Question Videos
What is the equation that gives percentage purity in terms of the mass of the pure chemical and the mass of the sample?
A mixture of nitrogen and oxygen gas has a mass of 1.20 kg. After 250 g of oxygen in the mixture is reacted with a metal, pure nitrogen is left behind. To 2 significant figures, what is the percentage purity of nitrogen in the original mixture?
An impure sample of aluminum bromide contains contaminants by weight. What is the percentage purity of the sample?