Teaching Science

Grade 11 Chemistry, University Preparation

This course enables students to deepen their understanding of chemistry through the study of the properties of chemicals and chemical bonds; chemical reactions and quantitative relationships in those reactions; solutions and solubility; and atmospheric chemistry and the behaviour of gases. Students will further develop their analytical skills and investigate.

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General Chemistry

Discovery: Fixing Nitrogen

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Updated March 17, 2014
Discovery is a BBC Radio 4 programme that explores today's most significant scientific discoveries and talks to the scientists behind them.

Today, 3.5 billion people are alive because of a single chemical process. The Haber-Bosch process takes nitrogen from the air and makes ammonia, from which synthetic fertilizers allow farmers to feed our massive population. Ammonia is a source of highly reactive nitrogen, suitable not just for fertilizer, but also as an ingredient in bomb making and thousands of other applications.

We make around 100 million tonnes of ammonia annually — and spread most of it on our fields. But this is a very inefficient way to use what amounts to 1-2% of the planet's energy needs. Only around 20% of fertilizer made ends up in our food.

Matter, Chemical Trends, and Chemical Bonding

Chemical Reactions

Quantities in Chemical Reactions

Solutions and Solubility

Gases and Atmospheric Chemistry