Chapter 2: Oxidation

Question 1

What is oxidation?

Answer 1

The gain of oxygen

Question 2

What is reduction?

Answer 2

The removal of oxygen

Question 3

What’s the phlogiston theory?

Answer 3

Things that burn contain phlogiston

Question 4

What’s the conservation of mass theory?

Answer 4

Mass is never gained or lost in a chemical reaction, but when we burn magnesium (for example) the phlogiston escapes decreasing the mass

Question 5

How do metals react with oxygen?

Answer 5

They react forming metal oxides,

Magnesium+oxygen->magnesium oxide
2Mg+O2->2MgO

Question 6

What are metal oxides?

Answer 6

Bases, they react with acids and neutralise them. Some metal oxides dissolve in water to produce alkaline solutions

Question 7

How do non- metals react with oxygen?

Answer 7

They produce non-metal oxides,

carbon+oxygen->carbon dioxide

Question 8

What are non-metal oxides?

Answer 8

They are acids and react with bases and neutralise them. Some of these oxides dissolve in water to produce acidic solutions