Patterns Of Reactivity

Question 1

What happens if u add heat to copper

Answer 1

Piece of copper turns black and glowed slightly

Question 2

What happens if u add heat to iron

Answer 2

Orange sparks glowed red

Question 3

What happens if u add heat to magnesium

Answer 3

Bright white light and formed a white powder after

Question 4

Why is lithium, sodium and potassium stored under oil

Answer 4

they can react with water and oxygen

Question 5

Copper, magnesium and iron in order of reactivity

Answer 5

Magnesium>iron>copper

Question 6

Magnesium + oxygen -

Answer 6

Magnesium oxide

Question 7

Iron + oxygen -

Answer 7

Iron oxide

Question 8

Copper + oxygen -

Answer 8

Copper oxide

Question 9

Alkali metals reacting with water similarities

Answer 9

-react vigorously
-give off gas
-float
-metal disappears
-moves across surface

Question 10

What safety precautions are taken when using these metals

Answer 10

Safety glasses
metals are stored under oil
Safety screen

Question 11

What Hazard symbols are on each jar of metal

Answer 11

flammable- could catch fore easily
Corrosive- if the metal reacts with water forming an alkali , can also burn tissue

Question 12

Hydroxides definition

Answer 12

The alkali solutions formed as the group 1 metals react with water

Question 13

Calcium with water observation

Answer 13

Sinks and rises, bubbles of gas, vigorous reaction, calcium disappears

Question 14

Magnesium with water observation

Answer 14

A few bubbles of gas, reacts slowly

Question 15

Copper with water observation

Answer 15

doesn’t react

Question 16

What two things are produced when metals react with water

Answer 16

Metal hydroxide + hydrogen

Question 17

magnesium calcium and copper in order of reactivity most reactive first

Answer 17

calcium> magnesium>copper

Question 18

Calcium + water-

Answer 18

Calcium hydroxide + hydrogen

Question 19

Magnesium + water -

Answer 19

Magnesium hydroxide + hydrogen

Question 20

Copper+ water-

Answer 20

No reaction

Question 21

What is usually produced when a metal reacts with an acid

Answer 21

Hydrogen

Question 22

Which metals should u not try put into acids

Answer 22

Potassium, sodium and lithium bc they are very reactive

Question 23

Aluminium and water observations

Answer 23

Reacts slowly with water

Question 24

Aluminium and dilute acid

Answer 24

Does react a little bit

Question 25

Why does aluminium resist corrosion

Answer 25

It forms a protective oxide layer on its surface and this protects the aluminium

Question 26

Copper strip to silver nitrate =

Answer 26

Silver crystals formed on the piece of copper and the colourless solution will turns blue/green colour

Question 27

What does rust do to steel

Answer 27

Makes it flaky, weak and dangerous

Question 28

What is silica gel used for

Answer 28

To remove moisture from the steel

Question 29

What is the chemical name for rust

Answer 29

Hydrated iron lll oxide

Question 30

Name two conditions required for rusting

Answer 30

Water and oxygen

Question 31

4 methods to prevent iron from rusting

Answer 31

Paint or oil it
Plastic coating
Galvaniseing
Sacrificial prtection

Question 32

How does plastic coating work

Answer 32

Prevents air and moisture

Question 33

What is galvanising

Answer 33

A layer of zinc

Question 34

Name two metals used for galvanising

Answer 34

Iron and chromium

Question 35

What is the cheapest method of preventing moisture

Answer 35

High water pressure

Question 36

Give one example of when sacrificial protection is used

Answer 36

Zinc bars on ships and magnesium

Question 37

What is copper used for

Answer 37

Water pipes

Question 38

Best way to prevent rusting on a gate

Answer 38

Oiling

Question 39

Best way to prevent rusting on a hull of a ship

Answer 39

Sacrificial protection

Question 40

Best way to prevent rusting on a machinery

Answer 40

Oil

Question 41

Best way to prevent rusting on a iron nail

Answer 41

Galvanising