4.1 Reactivity of metals

Question 1

What happens when metals react with oxygen? What type of reaction is it?

Answer 1

Metal oxide is produced; oxidation.

Question 2

What happens when metal reacts with water?

Answer 2

Metal hydroxide and hydrogen is produced.

Question 3

Reduction in terms of oxygen

Answer 3

When the reactant loses oxygen.

Question 4

Oxidation in terms of oxygen

Answer 4

When the reactant gains oxygen.

Question 5

Reactivity

Answer 5

The tendency for a metal to form positive ions.

Question 6

Reactivity series

Answer 6

Please - Potassium
Stop - Sodium
Loudly - Lithium
Calling - Calcium
My - Magnesium
Crazy - CARBON
Zebra - Zinc
In - Iron
Her - HYDROGEN
Class - Copper
She - Silver
Grunts - Gold

Question 7

Reaction of K, Na, Li, Ca, Mg, Zn, Fe, Cu with water and dilute acid.

Answer 7

Potassium, Sodium, Lithium: (These are highly reactive and react readily with water)
Calcium: (Reacts with water, but less vigorously than the alkali metals)
Magnesium, Zinc, Iron: (React with steam and acids)
Copper: (Unreactive with both water and dilute acids)

Question 8

Metal extraction.

Answer 8

• Un reactive metals found in the earth as native metals.
• Most metals are found as compounds that require chemical reactions to extract the metal.

Question 9

How are metals less reactive than carbon extracted?

Answer 9

Can be extracted from their oxides by reduction with carbon (example of displacement).

Question 10

Oxidation in terms of electrons

Answer 10

When the reactants lose electrons.

Question 11

Reduction in terms of electrons

Answer 11

When the reactants gain electrons.