This course is the third 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.
In this first content lecture in Part 3, Organic and Physical Chemistry, we look at what we mean by the term 'organic' as applied to chemical compounds. We then go on to look at where these organic chemicals naturally come from, and then we turn our attention to the simplest organic group, the alkanes.
00:20 What is organic chemistry?
01:32 Where do organic compounds come from?
09:38 The Alkanes
15:48 Combustion of Alkanes
17:21 Substitution reactions
In this lecture we first of all recap on what we mean by 'organic chemistry' and the group known as the Alkanes. Alkanes are described as 'saturated hydrocarbons' and in this lecture we introduce a group of 'unsaturated hydrocarbons' known as the Alkenes. Having looked at the properties of the Alkenes we then move on to the Alcohol group, as exemplified by Ethanol.
00:00 Introduction and recap
03:05 Formula and structure of Alkenes
06:10 Chemical properties of Alkenes
10:30 Manufacture of Ethanol
15:45 Uses of Ethanol
16:40 Dehydration of Ethanol
In this lesson we start looking at Physical Chemistry. After a brief recap on the pH scale we consider the common acids and alkalis, and how salts are formed. We investigate the reactions of salts and then complete the lesson with a summary of three ways in which salts might be prepared.
00:00 Introduction, the pH scale
04:01 Common acids and alkalis
04:52 Salt formation
06:53 Reactions of salts
13:00 Preparing soluble salts from acids
14.42 Preparing insoluble salts using precipitation reactions
16:02 Acid- Alkali titrations
This lesson is concerned with the energy changes that take place during chemical reactions. I start the lesson off with a warning - it's not going to be easy! There are calculations involved, and you will need to take your time and ensure that you follow everything. If not, pause the video, go back and repeat sections as many times as possible until you have it clear in your mind. Good luck!
00:40 Exothermic and Endothermic reactions
05:50 Calculating enthalpy changes
16:37 Making and breaking bonds
In this lesson we begin by considering just what we mean by the term 'rate of reaction'. A number of factors can affect the rate of reaction, and we go on to consider each one in turn. Activation energy is then described, and we complete the lesson with a look at classic rate of reaction experiments.
00:22 What is the 'rate of reaction'?
03:05 Factors affecting the rate of reaction
08:30 Activation energy
09:55 Rate of reaction experiments
The final lesson in this course covers the topic of reversible reactions. We begin by defining what we exactly mean by the term 'reversible reaction', and two examples are given to help make the idea clearer. We then go on to look at the concept of a 'closed system' and the impact this will have on reversible reactions.
00:20 What is a 'reversible reaction'?
01:45 Example of a reversible reaction (1)
03:15 Example of a reversible reaction (2)
05:05 Reversible reactions and closed systems
Twenty short questions to test your understanding of this section!
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.