Chemistry

Question 1

What is potable water?

Answer 1

Water that is drinkable

Question 2

How can you make potable water from seawater?

Answer 2

Distillation

Question 3

How do you sterilise water to make it potable ?

Answer 3

Add chlorine or ozone or UV light

Question 4

How can you tell if water is pure?

Answer 4

It will boil exactly at 100C

Question 5

What does a catalyst do?

Answer 5

a substance that speeds up a reaction

Question 6

What happens to the rate if you decrease the temperature?

Answer 6

Decreases

Question 7

What must happen between particles for a reaction to occur?

Answer 7

Collisions

Question 8

What is the minimum amount of energy need to start a reaction called?

Answer 8

Activation energy

Question 9

Why does increasing the concentration increase the rate?

Answer 9

More particles per set volume so more frequent successful collisions

Question 10

How do you calculate average rate of reaction from a graph?

Answer 10

Work out the volume of gas produced at time stated and divide volume by
time.