Neytralisation

Question 1

What is a base

Answer 1

Something that can neutralise an acid

Question 2

What is neutralisation

Answer 2

Where an acid is cancelled out by a base

Question 3

What are the four different types of bases

Answer 3

• reactive metals
  -metal hydroxides ( alkalis )
• metal carbonates
  -metal oxides

Question 4

What is a product of all neutralisation reacts

Answer 4

A salt + water

Question 5

What is the name of the salt determined by

Answer 5

The name of the acid and base that were used to make it

E,g magnesium + hydrochloric acid = magnesium chloride + water (salt)

Question 6

What charge is a salt

Answer 6

Ionic ( metal and non metal)

Question 7

What is the formula of salt

Answer 7

Acid + base = salt + water

Question 8

What is an example of parent acids salt name

Answer 8

Hydrochloric acid - chloride
Sulfuric acid - sulfate
Nitric acid -nitrate
Ethanoic acid - ethanoate

Question 9

What are the four state symbols

Answer 9

(s) solid
(g) gas
(l) liquid
(aq) aqueous (in solution)

Question 10

What are spectator ions

Answer 10

These are present in both before and after the reaction has occurred

Question 11

What gas is always produces when metal carbonate neutralises an acid

Answer 11

Carbon dioxide

Question 12

What is the chemical test for carbon dioxide

Answer 12

That it turns limewater cloudy

Question 13

What is a titration

Answer 13

Is a laboratory technique to determine the concentration of a solution by reacting it with the solution of known concentration (titrant)

Question 14

What is the formula for metal carbonates

Answer 14

Metal carbonate + acid = salt + water + carbon dioxide

Question 15

What is the formula of metal oxide

Answer 15

Metal oxide + acid = salt + water

Question 16

What is the formula of metal hydroxides

Answer 16

Acid+alkali= salt + water

Question 17

Is all bases alkali and why

Answer 17

They are not all alkali because alkalis are water soluble and not all bases dissolve in water, so they would not be alkalis

Question 18

What reactive metals don’t we use to neutralise an acid and why

Answer 18

The reactive metals in group 1 and most of group 2 because they are too dangerous however they would still neutralise an acid

Question 19

What is the word for the reactive metals that neutralise an acid safely

Answer 19

MAZIT metals

Question 20

What are the MAZIT metals

Answer 20

magnesium , aluminium , zinc , iron and tin

Question 21

Which of the bases are alkali

Answer 21

Metal hydroxides

Question 22

Describe the chemical test for hydrogen

Answer 22

Add a piece of magnesium into the hydrochloric acid and continue to add pieces until all acid has reacted ( no more gas is produced ) .
While the hydrogen gas is collecting in a clean test tube secure it by holding ur thumb over the lid so none of the hydrogen escapes

(By lighting a match on the air of the test tube once removed thumb and checking for a pop )

Question 23

Chemical test for hydrogen simplified

Answer 23

Magnesium + hydrochloric acid = magnesium chloride + hydrogen

Question 24

How does hydrogen gas burn

Answer 24

Hydrogen gas burns with a pop

Question 25

What is the general formula for reactive metals

Answer 25

Metal + acid = salt + hydrogen

Question 26

What are concordant results

Answer 26

Results that are within 0.2cm (3 ,cubed) of each other these are used to calculate the average titre

Question 27

What is the meniscus

Answer 27

The curve at the top of the burette always read the burette from the bottom curve of the meniscus

Question 28

What is the end point

Answer 28

The point where the colour changes and the acid has become neutral

Question 29

What is the rule for naming salt

Answer 29

Take the metal from the base & join to changed name of acid

Question 30

What is a precepitate reaction

Answer 30

Two solutions are mixed together forming another solution and a solid

Question 31

How are insoluble salts made

Answer 31

Through precipitate reactions

Question 32

How to retrieve a soluble salt

Answer 32

After neutralisation , the solution should be filtered to remove any excess base and then evaporated to remove water

Question 33

What are titrations used for

Answer 33

They are used to accurately identify how much alkali is required to neutralise an acid ( vide versa)

Question 34

When is a metal oxide neutralisation complete

Answer 34

when the solution turns pH paper green.

Question 35

When is a metal carbonate solution complete

Answer 35

is complete when no more bubbles of carbon dioxide are produced.

Question 36

When is a alkali neutralisation complete

Answer 36

when the indicator changes colour from purple to green

Question 37

When is a reactive metal neutralisation complete

Answer 37

when no more bubbles of hydrogen are produced.