C5(Chemical Changes)

Question 1

What is the metal reactivity series

Answer 1

Question 2

What is the gas given off when metals react with water or dilute acids

Answer 2

Hydrogen

Question 3

What is a displacement reaction

Answer 3

A more reactive metal will displace a less reactive metal from its aqueous solution

Question 4

What is an example of a displacement reaction

Answer 4

Question 5

What is oxidation

Answer 5

The loss of electrons and gain of oxygen

Question 6

What is reduction

Answer 6

Gain of electrons and loss of oxygen

Question 7

What is an ionic equation

Answer 7

Question 8

What is example of a half equation for oxidation and reduction

Answer 8

Question 9

How can metals be extracted

Answer 9

-The oxides of metals below carbon in the series can be reduced by carbon to give the metal element
-Metals more reactive than carbon are extracted by electrolysis

Question 10

What is the word equation to make a salt

Answer 10

Question 11

What acids provide the negative ions present in all salts

Answer 11

Question 12

What happens when an acid reacts with a base

Answer 12

A neutralisation reaction occurs

Question 13

What is the word equation to make a salt using a base

Answer 13

Question 14

What is an example of how to work out the sum of the charges

Answer 14

Question 15

What is the word equation to make a salt using an alkali

Answer 15

Question 16

What is the word equation to make a salt using a carbonate

Answer 16

Question 17

What is an acid

Answer 17

Question 18

What is an alkali

Answer 18

Question 19

What is a base

Answer 19

Question 20

What is the ph scale

Answer 20

Question 21

What is a strong acid

Answer 21

Strong acids dissociate fully in water to produce the maximum number of H+ ions

Question 22

What is a weak acid

Answer 22

Weak acids do not fully dissociate into H+ ions

Question 23

How can the ph value be related to the concentration of H+ ions

Answer 23

Question 24

Examples of half equations, ionic compounds and ionic equations

Answer 24

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Question 27

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Question 28

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Question 29

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Question 30

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Question 31

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Question 32

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Question 33

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Question 35

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Question 36

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Question 37

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Question 38

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Question 39

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Question 40

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Question 48

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Question 49

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Question 51

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