Mixtures
Subjects / Core Science / OCR Gateway Science B
Solid, liquid and gas are the three states of matter, and mixtures of them can be formed in a variety of ways. The simplest kind of mixture is a solution. The solid disappears because it is broken up into particles that are too small to be seen. We can measure how much solid dissolves in a certain mass of liquid. This is called the solubility. In a suspension, the particles are small enough so that they don't settle out as sediment but are just large enough to be seen. A suspension is one kind of colloid. Colloids are substances that have mixtures of states. A jelly has some properties like a solid and some like a liquid. Some very useful materials are mixtures. These include emulsions, solutions and alloys. We will consider the various types of mixtures in this title.
| Author: | Mike Ryan | Publisher: | GCSEPod® |
| Narrator: | Pauline Addis | ISBN: | 978-1-84906-184-1 |
| Video ISBN: | 978-1-84906-684-6 |
Chapters
- States of Matter
- Solution and Suspension
- Colloids
- Uses of Mixtures
Exam Board Relevance
- Edxcel
- AQA
- CEA
- IGCSE (EdExcel)
- OCR
- SQA
- WJEC
- IGCSE (CiE)
Includes original GCSEPod image art. Additional pictorial images created by Damon Smith
Curriculum and Exam Board Information
Key Issues
Titles
Chapters
- describe the difference between a solution and suspension
- describe the disperse phase and the continuous phase of a variety of colloids, a foam as a gas dispersed in a liquid or solid
- describe the disperse phase and the continuous phase of a variety of colloids, a gel as an example of a liquid dispersed in a solid
- describe the disperse phase and the continuous phase of a variety of colloids, a sol as a solid dispersed in a liquid or solid
- describe the disperse phase and the continuous phase of a variety of colloids, an aerosol as a liquid dispersed in a gas
- describe the disperse phase and the continuous phase of a variety of colloids, an emulsion as one liquid dispersed in another
- explain how the properties of each example makes it fit for its use
- identify examples of mixtures with one substance finely mixed with another, for example: aerosols as a liquid in a gas
- identify examples of mixtures with one substance finely mixed with another, for example: emulsions as one liquid in another
- identify examples of mixtures with one substance finely mixed with another, for example: foams as a gas in a liquid
- identify examples of mixtures with one substance finely mixed with another, for example: gel as a liquid in a solid
- identify examples of mixtures with one substance finely mixed with another, for example: solutions and suspensions as examples of a solid in a liquid
- identify the states of matter that make up examples of these mixtures
- recall a use for one example of each type of mixture
- recognise that the substances in the mixture may be solids, liquids or gases
- state that a colloid consists of one substance (or mixture of substances) finely dispersed in another substance (or mixture of substances)
- state that many materials we use consist of one substance finely mixed with another
- use the terms disperse phase and continuous phase to describe colloids
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