Types Of Reaction, Metals And Their Compounds

Question 0

State the chemical formula of rust

Answer 0

4fe+ 3o2 ~ 2fe2o3

Question 1

State the 2 chemicals other than iron required for rusting

Answer 1

Oxygen and water

Question 2

State the chemical test for oxygen

Answer 2

Relight glowing splint

Question 3

What percentage of he air is oxygen

Answer 3

21%

Question 4

What 3 raw materials are added to the blast furnace

Answer 4

Hematite (iron oxide)
Limestone (calcium carbonate)
Coke (carbon)

Question 5

How is iron extracted from the blast furnace

Answer 5

Oxygen reacts with coke to give carbon dioxide (this is the heat energy)
Carbon dioxide reacts with more coke to produce carbon monoxide
Carbon monoxide reduces the iron oxide in the ore to give molten iron
The limestone reacts with the sand to produce slag(calcium silicate)

Question 6

Equations in blast furnace

Answer 6

Oxygen reacts with coke to form carbon dioxide
C+ O2 - CO2
Limestone breaks down to form carbon dioxide
CaCO3 - CO2 + CaO
Carbon dioxide reacts with coke.To get carbon monoxide
CO2+C - 2CO
carbon monoxide reduces iron
3CO+ Fe2O3- 2Fe+ 3CO2
Limestone reacts with sand to form slag
CaO+ SiO2 - CaSiO3

Question 7

What is slag used for

Answer 7

To build roads

Question 8

What is the main impurity round in iron ores

Answer 8

Sand (silicon dioxide)

Question 9

What is the type of bonding in metals

Answer 9

Metallic bonding

Question 10

What does malleable mean

Answer 10

A metal can be hammered into shapes

Question 11

What does ductile mean

Answer 11

It can be stretched and drawn out into wires

Question 12

What type of reaction is this

Cuo+Mg~ MgO +Cu

Answer 12

Displacement

Question 13

What are properties of metals

Answer 13

High boiling point
Malleable
Ductile
Shiny
Strong
Magnetic
Conductor
Sonorous 
High melting point
Dense
Solid

Question 14

Why are metals malleable and ductile

Answer 14

The metal ions can easily slide over eachother

Question 15

Why are metals a good conductor of heat and electricity

Answer 15

They have delocalised,free elections which can move, so carry electrical current or heat

Question 16

What can you say about the strength of metallic bonds

Answer 16

Metallic bonds are strong so metals can maintain a regular structure and usually have high melting and boiling points

Question 17

Describe the structure and bonding in a metal

Answer 17

Metals from structures In which electrons in the other shells of the metal atoms are free to move, the metallic bond is the force of attraction between theses free electrons and metal ions