Chemistry
High School (9–10)
General
Mixtures and Solutions › Mixtures, Solutions and ColloidsMixtures and Solutions › Separation of MixturesMixtures and Solutions › Elements, Compounds and ChangesChapter 2Is Matter Around Us Pure?
A shop sells pure milk, pure butter and pure honey. Is the milk that you drink really pure in the way a chemist uses the word? In this chapter we learn what scientists mean by a pure substance, and how it differs from a mixture. We study solutions, suspensions and colloids, and the ways to separate the parts of a mixture. Then we meet the elements and the compounds that everything is made of. Python helps us with the calculations.
Part of Chemistry · High School (9–10) (chapter 2)
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Mixtures, Solutions and Colloids
Sea water, milk, muddy water and a glass of lemonade all look like one thing, but each is a mixture. In this course we sort mixtures into solutions, colloids and suspensions, and we learn to say how much of a substance is dissolved in a solution.
Separating the Parts of a Mixture
Salt is taken from the sea, oxygen from the air, and petrol from crude oil. Every one of them is a mixture that must be separated. Here we learn the main methods, and we choose the right one from the properties of the parts.