Intermediate 1 Unit 1d Acids & Alkalis

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15

22 23 24 25 26

16 17 18 19 20 21

How would you measure the

pH of a substance?

A pH paper or universal indicator and check the colour

Name a acid used in the lab.

Hydrochloric acid,

sulphuric acid , nitric acid.

Name an alkali used in the lab.

Sodium hydroxide, lime water and

ammonia solution

What are the pH values for an acid?.

Below 7

What is the pH of a neutral solution?

7

What are the pH values for an alkali?

Above 7

What happens to the acidity as the pH of an acid goes down?

It becomes more acidic.

What happens to the pH of an acid when diluted with water?

pH goes up

What happens to the pH of an alkali when diluted with

water?

It goes down

What happens to the acidity of an acid when diluted with water?

It becomes less acidic

What happens to the alkalinity of an alkali when diluted with water?

It becomes less alkaline

Name a common household acid.

Vinegar, lemonade,

soda water and coke.

Name a common household alkali.

Baking soda, oven cleaner, dishwasher powder, bleach and

soaps.

What type of chemical reaction takes when an acid is used?

Neutralisation

What are the products when sodium hydroxide neutralises

hydrochloric acid?

Sodium chloride and water

Name the salt produced when potassium hydroxide neutralises

sulphuric acid.

Potassium sulphate

Name the salt produced when calcium carbonate neutralises

nitric acid.

Calcium nitrate

What happens to the pH of an acid when it is neutralised?

It goes up to 7

What happens to the pH of an alkali when it is neutralised?

It goes down to 7

What are the products when a metal carbonate neutralises

an acid?

Salt, water and carbon dioxide gas

Give an everyday example of neutralisation.

Treatment of indigestion, reducing tooth decay, reducing soil acidity

What is produced when an alkali neutralises an acid?

Salt and water

Which oxides dissolve in water in the atmosphere to produce acid

rain?

Carbon dioxide, sulphur dioxide and nitrogen dioxide

How is sulphur dioxide produced?

Burning fossil fuels

How is nitrogen dioxide produced in a car engine?

Sparking of air

in the engine

Give an example of the damaging effect of acid rain?

Destroys buildings made from rock, structures made from steel/iron, soils and animal and plant life.

Intermediate 1 Unit 1d

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15

22 23 24 25 26

16 17 18 19 20 21