Chemistry in Society - Metals

Question 1

Describe the structure of a metal in terms of positively charged ions and delocalised electrons.

Answer 1

Positive metal ions bond with delocalised electrons.
The delocalised electrons can be attracted to more than one metal ion.

Question 2

Why can metals conduct electricity?

Answer 2

The delocalised electrons are free to move and carry charge which allows metals to conduct electricity.

Question 3

Write the general word equation for a metal reacting with oxygen.

Answer 3

metal + oxygen → metal oxide

Question 4

Write the general word equation with reactive metal reacting with water.

Answer 4

Reactive metal + water → metal hydroxide + hydrogen

Question 5

Write the general word equation with metal reacting with acid.

Answer 5

Acid + metal → Salt + hydrogen gas

Question 6

Name the metals which react with water, acids and oxygen. From most reactive to least reactive.

Answer 6

Potassium
Sodium
Lithium
Calcium

Question 7

Name the metals which react with acids and oxygen. From most reactive to least reactive.

Answer 7

Magnesium
Aluminium
Zinc
Iron
Tin
Lead

Question 8

Name the metals that react with oxygen. From most reactive to least reactive.

Answer 8

Copper
Mercury
Silver

Question 9

Name the metal that doesn’t react with water, acids or oxygen.

Answer 9

Gold

Question 10

Define Oxidation

Answer 10

A reaction in which electrons are lost or oxygen is added.

Question 11

Define Reduction

Answer 11

A reaction in which electrons are gained.

Question 12

Define Redox

Answer 12

A reaction in which oxidation and reduction happens at the same time.

Question 13

Explain how to write an ion electron equation.
Reduction

Answer 13

Go to page 10 of the data booklet. Find the metal (element) you need. Write as shown.

Question 14

Explain how to write an ion electron equation.
Oxidation

Answer 14

Go to page 10 of the data booklet. Find the metal (element) you need. Write Right to left - switch the arrow.

Question 15

Explain how to combine ion-electron equations. (A REDOX equation)

Answer 15

Write out your oxidation and reduction ion-electron equations.
Check if there are the same number of electrons in each equation.
If there is not multiply the equation so that there is.
Write everything on the left hand side of the equations together then draw an arrow and write everything on the right hand side of the equation together.
Cross off the electrons.
Rewrite the equation without the electrons.

Question 16

Describe three methods of extracting metal from its ore.

Answer 16

Heating
Heating with carbon or carbon monoxide
Electrolysis