Acids and metals

Question 1

What causes indigestion

Answer 1

Too much acid in the stomach

Question 2

What causes heartburn

Answer 2

When too much acid in the stomach is able to escape the top of the stomach and into the tue connecting to the mouth.

Question 3

What are indigestion pills

Answer 3

Antacids, alkalis, bases

Question 4

What is the neutralisation formula

Answer 4

Acid + Base —> water + salt
Or
Acid + Carbonate —> Water + salt + carbon dioxide

Question 5

What is the difference between a base and alkali

Answer 5

An Alkali is a base that has been dissolved in water. Not all bases are soluble

Question 6

Why does the stomach produce acid

Answer 6

To digest food and kill bacteria

Question 7

Chemical tests

Answer 7

Chlorine-litmus paper bleaches 
Acids-litmus paper goes red
Alkali-litmus paper goes blue
Oxygen-relight glowing splint
Carbon dioxide-limewater goes cloudy
Hydrogen-squeaky pop

Question 8

Uses of chlorine

Answer 8

Making PVC
killing microorganisms in water
Manufacturing bleach and cleaning products

Question 9

How can iron be extracted from haematite

Answer 9

Heating it with carbon

Iron oxide + carbon —> iron + carbon dioxide

Question 10

How can metals more reactive than zinc be extracted

Answer 10

Electrolysis of the molten ore