science 8.2

Neutralisation

-acids and alkalis can cancel each other out, when you mix them together they react together and make a neutral solution .This is called neutralisation.

-neutrality is also an chemical property of a substance.

If u add to much acid to an alkali

it makes acidic liquid

if you add too little acid to an alkali

it stays an alkaline liquid

what are the colours of acid,neutral and alkali

acid is red.Neutral is green and alkali is yellow.

burette?

a special piece of equipment to neutralise an alkali very accurately.

what does your stomach produces?

hydrochloric acid

what does the acid gives the stomach?

the right condition to digest your food

what happens when ur stomach produces too much acid?

indigestion and can be very uncomfortable

what type of medicines that helps with indigestion?

Antacids and they are all alkalis and they neautralise the acid.

how many bacterias in ur mouth?

millions

what the bacteria in your mouth feed on

pieces of food left on the teeth.

what does the bacteria produce when they feed and what does this do to ur teeth?

Bacteria produces acid when they feed. The acid damages your teeth and make them decay.

what does toothpaste do?

Toothpaste contain alkali and this helps to neutralise the acid

what is in the air in some countries that make the rain acidic?

harmful chemicals

what does the acid rain do?

The acid rain damages tree and changes the pH of the lakes, rivers and ponds. The plants and animals cannot live in acid conditions.

Why do some countries drop alkalis into the lakes?

To neutralise the acid.

Why does plants do not grow well in some areas?

The soil is very acidic

what do farmers spread to neutralise the acid so that the plants can grow better?

lime