Acids and bases 1

What is an acid?

• Something that has a pH higher than 7

• Something which has a pH lower than 7

• Something with a pH of 7

• Something with no pH

Acids can be

• Sour tasting

• Soapy tasting

• Highly dangerous

• Always safe

Acids always have what element in them

• Chlorine

• Oxygen

• Carbon

• Hydrogen

The pH scale

• Goes from 1-15

• Is a measure of how reactive things are

• Is a measure of how well things get rid of or accept H+ ions

• Is a colourful bar

An indicator is

• Something on a car

• An acid

• A chemical that shows the pH of a substance

• A chemical which changes colour in relation to its environment.

Bases are all

• Alkalis

• High in pH

• Edible

• Cleaning agents

Which of these is an indicator

• Litmus

• Universal indicator

• Red cabbage indicator

• All of the above

Litmus goes what colour in an acid

• Red

• Blue

What colour does a neutral chemical go in universal indicator?

• Green

• Blue

• Red

• Yellow

Which of these is the symbol for corrosive?

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