The Reactivity Series of Metals

Question 1

Complete:
In order to allow the metals to react with oxygen, we simply burn them in ______ which contains ________ oxygen.

Answer 1

AIR which contains 20% oxygen

Question 2

What word do chemists sometimes use instead of ‘burning’?

Answer 2

Combustion

Question 3

complete the general equation for a metal burning in oxygen:
METAL + OXYGEN ……..

Answer 3

METAL OXIDE

Question 4

Which 2 metals react easily with cold water?

Answer 4

Potassium and sodium

Question 5

Describe how sodium (Na) reacts in water.

Answer 5

Fizzes, floats, moves around surface of water.
Melts and forms a ball, disappears, colourless solution forms.

Question 6

Describe how Potassium (K) reacts in water.

Answer 6

Same a sodium PLUS:
burns with a lilac flame, popping sound at end

Question 7

Potassiums and Sodium are stored in oil. Why?

Answer 7

To prevent a reaction with moisture and oxygen in air.

Question 8

Na and K are easily cut (soft metals) but tarnish rapidly in air.
TRUE or FALSE

Answer 8

TruThinke

Question 9

Consider the experiment to look at the reaction of calcium with cold water.
What were the immediate observations?

Answer 9

Calcium sinks and rises
Fizzes
Ca disappears
Test tube warms up
Filtrate is a colourless solution

Question 10

experiment: reaction of calcium with cold water

What does the gas burn with?

Answer 10

A pop

Question 11

Experiment: calcium and cold water

What colour does the filtrate turn pH paper?

Answer 11

Blue - alkali formed

Question 12

Experiment: calcium and cold water
What colour is the solution and what is the solouton known as?

Answer 12

solution turns milky.
Known as LIME WATER

Question 13

Which gas burns with a POP?

Answer 13

Hydrogen

Question 14

Complete the equation:

Calcium + water …….

Answer 14

Calcium hydroxide + hydrogen

Question 15

complete:

Sodium + water …..

Answer 15

sodium hydroxide + hydrogen

Question 16

Magnesium reacts VERY SLOWLY with cold water.
How could you speed this reaction up in an experiment?

Answer 16

REpalce the cold water with steam.

Question 17

Copper does not react with water or steam.
TRUE or FALSE

Answer 17

TRUE

eg. copper pipes, copper roof

Question 18

Which 2 metals are TOO reactive with acids?

Answer 18

sodium and potassium

Question 19

Which metal does NOT react with acid? Why?

Answer 19

ALUMINIUM, it is permanetely coated with a proective layer of aluminium oxide so it does not show its true reactivity.

Question 20

What is the general equation for a metal and an acid?

Answer 20

Metal + Acid —- Salt + Hydrogen

Question 21

The name the salt produced depends on thr acid used. Salts of hydrochloric acid are called ______?

Answer 21

CHLORIDES

Question 22

What happens in a ‘displacememet reaction’ ?

Answer 22

A more reactive metal will displace a less reactive metal from a compound.