Chemistry 5 9F Reactivity Flashcards Preview

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Flashcards in Chemistry 5 9F Reactivity Deck (85)
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1

How do we know sodium is a very cheap metal

With all that sodium chloride in the sea

2

What things might affect the cost of sodium metal

The process of getting sodium from sodium chloride costs a lot and takes a lot of labour and taking away the chlorine

3

Do all metals react with acid

No. Because not all metals react with acid

4

Why isn't armour in the Middle Ages likely to be made from aluminium

Because aluminium is very soft and wasn't discovered till mid 19th century

5

List some metals that's react well with water

Lithium, potassium and sodium

6

Reacting metals with oxygen equation

Metal + oxygen --> metal oxide

7

We are going to heat some metals in the air and record some observations
Copper
Iron
Magnesium

Copper-turns black
Iron-orange Sparks
Magnesium- bright white light

8

Put copper, iron and magnesium in order of reactivity (most reactive first)

Magnesium
Iron
Copper

9

Complete word equations for
Magnesium + oxygen -->
Iron + oxygen -->
Copper + oxygen -->

Magnesium + oxygen --> magnesium oxide
Iron + oxygen --> iron oxide
Copper + oxygen --> copper oxide

10

Reacting metals with water:
In year 8 we looked at alkali metals reacting with water:
How are the reactions similar?

They all get oxidised
Hydrogen is given off
Fizz across surface
React vigorously
They give off gas
Moves across surface

11

Reacting metals with water
In year 8 we looked at alkali metals reacting with water:
How do the reactions differ

Potassium catches fire and burns with a lilac flame

Sodium & potassium react more quickly than lithium (reactivity increases as you move down the group)

12

Reacting metals with water
In year 8 we looked at alkali metals reacting with water:
What safety precautions are taken when using these metals

Safety googles
Safety screen
Metals are stored under oil

13

Why are potassium, lithium and sodium stored under oil in their jars

Because they react vigorously with water

14

List the metals in order of reactivity starting no with the most reactive metal

Potassium
Sodium
Lithium

15

The alkaline solutions formed as the group 1 metals react with water are called......
Do the equation too

Hydroxides

Metal+water-->metal hydroxide +hydrogen

16

Results for the reaction of calcium magnesium and copper with water

Calcium- sinks and rises, bubbles of gas, vigorous reaction
Magnesium- a few bubbles of gas, reacts slowly
Copper-no reaction

17

What two things are produced when metals react with water

Metal hydroxide and hydrogen gas

18

Put the metals magnesium, copper and calcium in order of reactivity starting with the most reactive

Calcium
Magnesium
Copper

19

Complete the following word equations for the reactions of the metals with water, wrote no reaction if there is no reaction
Calcium+water-->
Magnesium+water-->
Copper+water-->

Calcium+water-->calcium hydroxide + hydrogen
Magnesium+water-->magnesium hydroxide+hydrogen
Copper+water-->no reaction

20

List all the metals you have met so far in order of reactivity starting with the most reactive with water

Potassium
Sodium
Lithium
Calcium
Magnesium
Iron
Copper
Silver

21

Equation for reacting metals with acid

Metal+acid-->salt+hydrogen

22

What is usually produced when a metal reacts with an acid

Salt and hydrogen

23

Which metals would you not try putting in acid and why

Potassium, sodium and lithium because they are explosive

24

Add a small piece of aluminium to 5cm cubed of water, then a small piece of aluminium to 5cm cubed acid
What do you observe?

Nothing happened for at least 5mins. Then bubbles of gas appeared and the aluminium turned dark grey

25

Add a small piece of aluminium to 5cm cubed of water, then a small piece of aluminium to 5cm cubed acid
How were your observations surprising?

Aluminium is high up on the reactivity series but it took quite a while for the aluminium to react with the acid

26

What does aluminium resist

Corrosion

27

Aluminium resists corrosion so where is it widely used

Outside as greenhouse metal frames

28

Why does aluminium resist corrosion

Aluminium resists corrosion as it forms a protective oxide layer

29

Mnomemic for reactivity series

Peter
Sold
Little
Chocolates
Mainly
All
Zeebos
Ironically
Tim
Likes
Chocolates
Sold
Gorgeously

30

Charlotte adds samples of potassium, aluminium and lead into water at room temperature state the observations and conclusions

Potassium- moves across the surface, catches fire- reacts violently

Magnesium-a few bubbles form on the surface-reacts slowly

Her conclusion that lead does not react with water is incorrect, a reaction is taking place but so slowly that it is difficult to see. The reaction is slow as lead is very unreactive in cold water, to speed up the reaction charlotte could use hot water or steam