110-167 (joel)

Question 1

A titration is used to measure fixed volumes of what

Answer 1

Acid and alkali that react with eacother

Question 2

A pipette is used in titrations to measure what

Answer 2

Fixed volume of a solution

Question 3

A burette is used in titrations to obtain what

Answer 3

Accurate measurements of the volume of the solution added

Question 4

In titrations what kind of indicator is used and an example

Answer 4

One with a sharp end point
e.g Phenoltphalein

Question 5

Results are repeated until you have 3 concordant results what does concordant mean

Answer 5

With in 0.1 of each other

Question 6

What does a strong acid do in an aqueous solution

Answer 6

It completely ionises

Question 7

What are examples of strong acids(3)

Answer 7

Nitric acid
Hydrochloric acid
Sulphuric acid

Question 8

What do weak acids do in an aqueous solution

Answer 8

Partially ionise

Question 9

What are examples of weak acids

Answer 9

Ethanoic, citric, carbonic

Question 10

The stronger the acid the lower or higher the pH

Answer 10

Lower

Question 11

As the pH deceased by 1 unit what happens to the hydrogen ion concentration

Answer 11

It increases by a factor of 10

Question 12

Acids produce what ions in aqueous solution

Answer 12

Hydrogen (H+)

Question 13

Aqueous solutions of alkalis contain what ions

Answer 13

Hydroxide ions (OH-)

Question 14

What is the pH scale

Answer 14

A measure of the acidity or alkalinity of a solution

Question 15

What can pH be measured with

Answer 15

Universal indicator or pH probe

Question 16

What is the pH of a neutral solution

Answer 16

7

Question 17

Acids have a pH of?

Answer 17

Less than 7

Question 18

Alkalis have a pH of ?

Answer 18

Greater than 7

Question 19

In neutralisation reactions what do the ions do

Answer 19

Hydrogen ions and hydroxide ions neutralise each other

H+ + OH- >H2O

Question 20

Acids react with some metals to produce

Answer 20

Salt plus hydrogen

Question 21

Sulphuric acid produce salts called
Hydrochloric acids produce
Nitric acids produce

Answer 21

Sulphates
Chlorides
Nitrates

Question 22

What are alkalis

Answer 22

Soluble metal hydroxides

Question 23

What are bases

Answer 23

Insoluble metal hydroxides

Question 24

When acids are neutralised by alkalis or bases what is produced

Answer 24

Salt plus water

Question 25

When acids are neutralised by a metal carbonate what is produced

Answer 25

Salt, water and carbon dioxide

Question 26

What happens to the excess solid when reacting insoluble base with an acid to make a soluble salt

Answer 26

It is used then filtered off after the reaction

Question 27

What can be done to salt solutions to produce pure solid salts

Answer 27

Crystallisation

Question 28

What is an oxidation reaction

Answer 28

Metals react with oxygen to form a metal oxide

Question 29

When metals react they lose what

Answer 29

Electrons to form positive ions

Question 30

What’s the reactivity series

Answer 30

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Tin lead
Hydrogen
Copper
Silver
Gold

Question 31

What is a displacement reaction

Answer 31

When a more reactive metal displaces a less reactive metal

Question 32

What do metals more reactive than hydrogen reactive with to form hydrogen

Answer 32

Acid

Question 33

When can reduction with carbon be used

Answer 33

With metals less reactive than hydrogen can be extracted from their ores

Question 34

What is reduction

Answer 34

The gain of electrons

Question 35

What is reduction

Answer 35

The loss of electrons

Question 36

What is oxidation

Answer 36

The loss of electrons