Year 9 Acids and Bases

pH

100

What is the pH of an acid?

Lower than 7

200

What is the pH of a neutral solution?

7

300

What is the range for the pH scale?

1 - 14

400

How many times stronger is an acid with a pH of 3 than an acid with a pH of 4?

10 times

500

I mix together an acid that has a pH of 5 and a base that has a pH of 9. What would be the pH of the final solution?

7

Acids

100

What do acids taste like?

Sour

200

Is the acid with a pH of 1 stronger or the acid with a pH of 4?

pH of 1

300

What state do acids need to be in to work?

Dissolved in water

400

What ion do all acids lose when they are dissolved in water?

H+ or hydrogen ion

500

At the same concentration, which one of the following is the strongest acid? Hydrochloric acid, folic acid, uric acid.

Hydrochloric

Bases

100

What do bases feel like when touched?

Soapy / slippery

200

True or false: Another name for bases is "alosaline" 

False

300

Bases can counteract acids when mixed together. What is this reaction called?

Neutralisation

400

What chemical property do all bases have?

They can absorb H+ / they produce OH-

500

When coming into contact with strong bases, you can get a special type of chemical burn. What is the name for this type of burn?

Caustic burn

Reactions

100

How many different types of reactions with acids are there?

3

200

What is a product in an acid-metal reaction?

hydrogen gas or salt

300

What are the products in an acid-carbonate reaction?

Water, salt and carbon dioxide

400

A reaction used hydrochloric acid and iron oxide to make iron chloride and water. What type of reaction is this?

Acid + metal oxide / neutralisation

500

A students conducted an experiment with an acid and an unknown chemical. A flammable gas was produced from this reaction. What type of reaction is this?

Acid-metal