Metals

Question 1

Why do Metals conduct electricity?

Answer 1

The delocalised electrons are the reason for metals being conductors of electricity.

Question 2

What are the products of a reaction between a metal and water?

Answer 2

Metal Hydroxide + Hydrogen (g)

Question 3

What is the products of a reaction between a Metal and Acid?

Answer 3

Salt + Hydrogen (g)

Question 4

What is the product of a reaction between a Metal and Oxygen?

Answer 4

Metal Oxide

Question 5

What are three examples of unreactive metals?

Answer 5

Silver
Gold
Platinum

Question 6

What is the test for Oxygen gas?

Answer 6

Relights a glowing splint.

Question 7

What is the test for Hydrogen?

Answer 7

Burns with a pop.

Question 8

What are the two tests for Carbon Dioxide?

Answer 8

Extinguishes a burning splint.

Causes limewater to change from colourless to cloudy.

Question 9

How do you extract the least reactive metals?

Answer 9

A small amount of heat.

Question 10

How do you extract “Middle” reactive metals?

Answer 10

Using heat and carbon/carbon dioxide

Question 11

How do you extract the most reactive metals?

Answer 11

Lots of heat energy (enough to melt the ore) or electrolysis.

Question 12

Why is DC current used for electrolysis?

Answer 12

DC current is used so the products can be identified.

Question 13

What is the definition of Metallic Bonding?

Answer 13

A metallic bond is formed when the electrostatic force of attraction between positively charged ions and delocalised electrons.

Question 14

What is meant by a delocalised electron?

Answer 14

Free to move.

Question 15

What is meant by the term Oxidation?

Answer 15

Oxidation is loss, for example a lithium ion would lose an electron to achieve a stable electron arrangement, and becomes an ion.

Question 16

What is meant by the term Reduction?

Answer 16

Reduction is gain, for example an oxygen atom would gain two electrons to achieve a stable electron arrangement and become an ion.

Question 17

What is a Redox reaction?

Answer 17

When oxidation happens, reduction happens as well. When reduction happens, oxidation happens as well.

Question 18

What is a Displacement reaction?

Answer 18

A type of redox reaction. When a metal higher in the electrochemical series is added to a solution of a metal lower in the electrochemical series the higher metal kicks out the lower metal.

Question 19

How does the distance between two metals on the electrochemical series affect the voltage produced?

Answer 19

The further apart the two metals are on the electrochemical series, the higher the voltage produced.

Question 20

What is a cell?

Answer 20

Chemical energy converted to electrical energy.

Question 21

How can a cell be made?

Answer 21

From two half cells connected by an ion bridge.

Question 22

What is the purpose of an ion bridge?

Answer 22

To complete the circuit.

Question 23

What is an ion bridge made of?

Answer 23

Filter paper soaked in electrolyte to complete the circuit.

Question 24

Metals in half cells should by kept in what type of solution and why?

Answer 24

Metals should be kept in a solution of their own ions to prevent any side reactions.

Question 25

Which metal gives the other electrons in a half cell?

Answer 25

The metal higher in the electrochemical series gives electrons to the metal lower in the electrochemical series.

Question 26

What can be used as electrodes in half cells that are not metals?

Answer 26

Graphite electrodes.