Chemistry 101 - Part 4 Chemistry in Society
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Chemistry 101 - Part 4 Chemistry in Society

An introductory course for anybody who wants to study chemistry - either towards future pathways or just for fun!
4.3 (39 ratings)
Instead of using a simple lifetime average, Udemy calculates a course's star rating by considering a number of different factors such as the number of ratings, the age of ratings, and the likelihood of fraudulent ratings.
5,016 students enrolled
Created by Graham Bray
Last updated 9/2013
English
Price: Free
Includes:
  • 1 hour on-demand video
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
What Will I Learn?
By the end of this course you will have received a thorough preparation in the principles of chemistry.
View Curriculum
Requirements
  • There are no essential course requirements, just a desire to learn more about Chemistry and a willingness to make the necessary effort!
Description

This course is the fourth and final part of a comprehensive introduction to Chemistry, covering everything you will need to know as you prepare for possible future exams. It doesn't matter how much, or how little, prior knowledge of Chemistry you've got as this course will take you through all the necessary stages.

Who is the target audience?
  • students who wish to follow a career in the sciences or medicine and who require really clear chemistry instruction
  • students who may already be following a course but who need additional support in order to successfully progress
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Curriculum For This Course
Expand All 6 Lectures Collapse All 6 Lectures 01:09:19
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Chemistry 101 - Part 4 Chemistry in Society
6 Lectures 01:09:19
Introduction to Chemistry in Society
02:48

In Lecture 2 of Part 4 we begin to look at the industrial applications of chemistry, and more specifically how we extract metals from their ores. The method of extraction depends upon the position of metals in what we call the reactivity series. Metals high in the reactivity series will require a lot of energy to extract them from their ores, and electrolysis is often used. Metals in the middle of the reactivity series can normally be extracted by heating with carbon. Metals at the bottom of the reactivity series are usually found uncombined with other elements.

00:00  The Reactivity Series
07:06  The extraction of aluminium
11:57  The extraction of iron
15:40  Properties and uses of aluminium and iron
Industrial Chemistry - Aluminium and Iron
19:41

In Lecture 3 of Part 4 we look at the chemistry of crude oil. We begin by looking at oil formation, millions of years ago, and how we extract it from the ground. Crude oil is a very thick, viscous liquid made up of many different fractions that are separated by fractional distillation. Further refinement of the products involves cracking to produce fractions with the required molecular weights. But the products of crude oil can be polluting, particularly when they burn, and in the last part of the lecture we look at how fuels used in cars contribute to air pollution.

00:25  Crude Oil
02:45  Fractional distillation of crude oil
07:35  Cracking hydrocarbons
10:43  When fuels burn
13:50  Cars and air pollution
Industrial Chemistry - Crude Oil
16:51

Lecture 4 of Part 4 follows on neatly from the previous section. We have already looked at how many products can be derived from crude oil. Plastics are very important products, and many are formed by the joining together of hydrocarbon chains. This is what we mean by the term 'polymerization' and here we look at both kinds - addition polymerization and condensation polymerization.

00:32  Monomers
01:33  Addition polymerization
06:20  Condensation polymerization
Industrial Chemistry - Polymerization
09:06

The last content lecture of Part 4 wraps up with a description of some very important industrial processes. We start with what is arguably the most important - the Haber Process, used to produce ammonia from the atmospheric gases nitrogen and hydrogen. We then progress to look at the industrial production of sulphuric acid - known as the Contact Process. Our final section describes the industrial manufacture of sodium hydroxide and chlorine.

00:00  Introduction
00:45  Ammonia (the Haber Process)
08:10  Sulphuric Acid (the Contact Process)
12:13  Sodium hydroxide and Chlorine
Industrial Chemistry - Haber and Contact Processes
17:26

Conclusions
03:27

Twenty quick questions to test your understanding of the Chemistry in Society topic.

Chemistry in Society
20 questions
About the Instructor
Graham Bray
4.6 Average rating
89 Reviews
5,426 Students
4 Courses
Director of STEM, East Sussex, UK

I have been a teacher in the UK for nearly 30 years, and am currently the Director of STEM (Science, Technology, Engineering and Maths) at a large comprehensive school in East Sussex. To bore you with the qualifications, I have a Joint Honours Degree in Botany and Zoology from University College, Cardiff, and a PhD in Biological Sciences from the University of East Anglia. I was also one of the first Advanced Skills Teachers in the South East of England.

I am a passionate believer in life-long learning, and I will do whatever I can to encourage learning for all ages. Using videos to enhance learning has great potential, and I try to exploit this through my websites.

On a personal level I am married to a primary school headteacher, and we have two grown-up daughters. When not creating videos or teaching I relax (!) by working out at the gym, watching rugby and football, and doing a little work around the garden.