# What happens to particles during dissolving?

In this lesson, we will learn what happens to particles during dissolving. We will investigate what happens when we mix water with salt, sugar and sand. For this lesson you will need a pencil and a piece of paper. If you would like to take part in the practical you will also need a glass of water and some sugar and salt. If you do not have these things then you can still take part in the lesson by watching the teacher's demonstration.

# What happens to particles during dissolving?

In this lesson, we will learn what happens to particles during dissolving. We will investigate what happens when we mix water with salt, sugar and sand. For this lesson you will need a pencil and a piece of paper. If you would like to take part in the practical you will also need a glass of water and some sugar and salt. If you do not have these things then you can still take part in the lesson by watching the teacher's demonstration.

## Lesson details

### Key learning points

1. Define solvent, solute and solution
2. Draw particle diagrams to represent a solution
3. Describe what happens to particles during dissolving

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Starter quiz

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### 5 Questions

Q1.
What is meant by a pure substance?
A substance with a mix of different particles
Correct answer: A substance with only one type of particle
Q2.
Is diagram A showing a pure or impure substance?
Pure
Q3.
What kind of substance is diagram B showing?
Impure gas
Impure liquid
Impure solid
Pure gas
Pure liquid
Q4.
What type of substance is diagram C showing?
Impure liquid
Impure solid
Pure gas
Pure liquid
Pure solid
Q5.
What type of substance is diagram D showing?
Impure gas
Impure solid
Pure gas
Pure liquid
Pure solid

## Exit quiz

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### 5 Questions

Q1.
Is sand soluble or insoluble?
Soluble
Q2.
Is salt soluble or insoluble?
Insoluble
Q3.
What is A in the diagram above?
Solution
Solvent
Q4.
What is B in the diagram above?
Solute
Solution