Salts And Electrolysis

Question 0

Acids

Answer 0

Substances that produce hurst often ions when added to water

Question 1

Pure water is… pH?

Answer 1

Neutral pH of 7

Question 2

Aqueous solution

Answer 2

Substance dissolved in water

Question 3

Bases

Answer 3

React with acids and neutralise them

Question 4

Alkalis

Answer 4

Bases that dissolve in water to make alkaline solutions

Question 5

Alkalis produce what ions

Answer 5

Hydroxide ions

Question 6

pH scale

Answer 6

Vales from 0-14

Question 7

Acidic have what pH

Answer 7

Low 0-2

Question 8

Alkaline have what pH

Answer 8

Very high 12-14

Question 9

Indicators

Answer 9

Different colours in acidic and alkaline solutions

Question 10

Which indicators call tell us the pH of a solution

Answer 10

Universal indicator and full-range Indicator

Question 11

What happens when an acid reacts with a base

Answer 11

Neutralisation reaction takes place and produces a salt and a water

Question 12

What can be made from a metal with an acid

Answer 12

Some salts can be made by the reaction of a metal with an acid producing hydrogen gas as well as salt

Question 13

How can we make soluble salts

Answer 13

By reacting an acid with an alkali

Question 14

What compound is produced in every neutralisation reaction

Answer 14

Water

Question 15

Precipitation

Answer 15

An important way of removing some metal ions from industrial waste

Question 16

Electrolysis

Answer 16

Process that used electricity to break down ionic compounds

Question 17

Electrolyte

Answer 17

The substance that is broken down

Question 18

Negative ions lose/gain at the electrodes

Answer 18

Lose electrons

Question 19

When negative ions lose electrons at the positive electrode to become neutral what is this called

Answer 19

Oxidation

Question 20

Gaining electrons is called

Answer 20

Reduction

Question 21

OILRIG

Answer 21

Oxidation Is Loss (of electrons)

Reduction Is Gain (of electrons)

Question 22

Aluminium oxide is electrolysed to..

Answer 22

Manufacture aluminium

Question 23

What is mixed with aluminium oxide to lower it’s melting point

Answer 23

Cryolite

Question 24

What form at the negative electrode when extracting aluminium

Answer 24

Aluminium

Question 25

What forms at the positive electrode when extracting aluminium

Answer 25

Oxygen

Question 26

Brine is

Answer 26

A solution of chloride in water

Question 27

When we electrolyse brine we get three products

Answer 27

Chlorine, gas and sodium hydroxide solution

Question 28

Electroplating

Answer 28

Uses electrolysis to put a thing coating of metal onto an object

Question 29

Describe how you would silver plate a small piece of copper jewellery

Answer 29

The copper jewellery is used as the negative electrode