CHEMISTRY FORM 1
- 1.1 What is matter?
- 1.2 What is Chemistry?
- 1.3 What does matter consist of?
- 1.4 Are the particles in matter stationary?
- 1.5 Arrangement, distance, and attraction between particles
- 1.6 Properties of matter (volume, shape and compression)
- 1.7 Conductors and non-conductors
- 1.8 Sources of heat
- 1.9 Bunsen burner
- 1.10 Role of Chemistry in society
- 2.1 Pure substances
- 2.2 Mixtures
- 2.3 Separation of Mixtures
- 2.4 Separation of solid-solid mixture
- 2.5 Separation of insoluble solid-liquid mixture
- 2.6 Separation of soluble solid-liquid mixture (solution)
- 2.7 Separation of immiscible liquid-liquid mixture
- 2.8 Separation of miscible liquid-liquid mixtures (solution)
- 2.9 Separation of liquid-gas mixture
- 2.10 Selecting and using appropriate methods of separating mixtures
- 2.11 Kinetic theory of matter
- 2.12 Classification by physical states
- 2.13 Effect of heat on physical states
- 2.14 Effect of impurities on melting and boiling points
- 2.15 Permanent and non-permanent changes
- 2.16 Definitions, chemical symbols and equations
- 3.1 Simple acid-base indicators
- 3.2 Universal indicators and pH scale
- 3.3 Reactions of acids with metals
- 3.4 Reactions of acids with carbonates and hydrogen-carbonates
- 3.5 Reactions of acids with bases
- 3.6 Effects of acids on substances
- 3.7 Applications of acids and bases
- 4.1 Composition of Air
- 4.2 Fractional distillation of liquid air
- 4.3 Rusting
- 4.4 Oxygen
- 4.5 Burning of substances in air
- 4.6 Atmospheric pollution
- 5.1 Candle wax and water
- 5.2 Reactions of metals with liquid water
- 5.3 Reaction of metals with steam
- 5.4 Preparation of hydrogen gas
Introduction to Chemistry: What matter consists of
1.0 Introduction to Chemistry
1.3 What does matter consist of?
To find out what matter consists of
Materials and substances required
- Potassium manganate (VII) or copper (II) sulphate crystals
- Clean water, beakers, spatula, and stirrer or glass rod
Open the video below, dilution of potassium manganate (VII) solution (courtesy ‐ Youtube Potassium permanganate and dilution | Molecular structure | Chemistry by KClassScienceChannel) and carefully observe what happens.
From the observations,
- What happens to the whole volume of water in the beaker when a small amount of potassium manganate (VII), an example of solids, is added?
- What must have happened to potassium manganate (VII) to cause the change observed?
- When more and more water is added (dilution), the purple colour slowly fades towards colourlessness. What does this tell us about the final size and spread of potassium manganate (VII) particles?
- What do potassium manganate (VII) and other solids consist of?
- From your experience, what happens when water (a liquid) is heated for a long time in an open container such as a sufuria or beaker?
- Air exists and we can feel it. Why is it that we cannot see air?
- In conclusion, matter consists of --- called --- (Check in your Chemistry course book or Internet).
- State other observations in real life that also support the conclusion in 7.
Answers to Questions 1.3
At home and around usWe can detect the taste of salt in food, sugar in tea, the aromatic smell of food and fruits, and the scent of a perfume. But we cannot see the substances responsible for them. Liquid air freshener comes out as a fine spray that disappears into invisible matter. These are further indications that matter consists of tiny invisible particles.
The invisible enemiesDeadly viruses such as HIV virus, coronavirus, ebola virus, and very many other disease-causing organisms exist as invisible particles. So they can enter our bodies without our knowledge. To protect ourselves, we should follow health guidelines given by the government and World Health Organization.
By The Guardian