Acid Reaction

Question 1

Explain acid

Answer 1

Acids are highly toxic substances. They can corrode metals usually making them into a salt and hydrogen gas.

Question 2

Explain salt

Answer 2

Although formally known as sodium chloride in this case it means any compound.

Question 3

Rule for acid reaction with metal

Answer 3

Acid and metal produce a salt and hydrogen gas

Question 4

Explain neutralisation

Answer 4

Acid and bases can neutralise each other when mixed forming a harmless substances.

Question 5

Rule for neutralisation

Answer 5

Acid and base produces a salt and water.

Question 6

Explain acids and carbonates.

Answer 6

When the base is a carbonate the reaction between it an acid produces carbon dioxide, a salt and water

Question 7

Rule for acid and carbonates

Answer 7

Acid and carbonate produces a salt, water and carbon dioxide.

Question 8

Explain decomposition

General rule

Answer 8

• occurs when one reactant breaks down into two or more products.

AB _> A+B

Question 9

Explain synthesis/ combination

General rule

Answer 9

• where two elements can react to form a new compound in A+B _> AB

Question 10

Explain combustion

Chemical formula

Example

Answer 10

• are exothermic as reactants have more energy than products
• heat and light produced
• oxygen is always required
• can complete or incomplete
• a series of bushfires as an example
• classified as an oxidation reaction
• methane + oxygen gas -> carbon dioxide + water vapour
• CH4 + 2O2 -> CO2 + 2H2O

ALL CAPITALS

Question 11

Explain antacids

Answer 11

• are tablets that contain bases that are able to neutralise acids. For example using them for heartburn

Question 12

Explain heartburn

Answer 12

Heartburn is caused when hydrochloric acid rises up you oesophagus and creates a burning sensation in your chest.