booklet 4-reactivity of metals

Question 1

what does the ph scale go from and to

Answer 1

0 to 14

Question 2

what does a lower ph show

Answer 2

the solution is more acidic

Question 3

what does a higher ph show

Answer 3

the more alkaline the solution is

Question 4

what ph level is said to be neutral

Answer 4

ph 7

Question 5

what sort of solutions do acids form

Answer 5

acids form an aqueous solution

Question 6

what ph do acids have

Answer 6

less than 7

Question 7

acids form what

Answer 7

acids form H+ ions in water

Question 8

what is a base

Answer 8

a base is an alkali

Question 9

what ph does a base have

Answer 9

above 7

Question 10

what sort of base is an alkali

Answer 10

a base that dissolves in water

Question 11

what do alkalis form

Answer 11

OH- ions in water

Question 12

what is the reaction between acids and bases called

Answer 12

neutralisation

Question 13

word equation for neutralisation

Answer 13

acid + base -> salt + water

Question 14

équation for neutralisation in terms if H+ and OH- ions

Answer 14

H+ (aq) + OH- (aq) -> H2O (l)

Question 15

the reactivity series of …

Answer 15

the reactivity series of metals

Question 16

what other two elements does the reactivity series of metals often include

Answer 16

carbon and hydrogen

Question 17

which metals will react with water - 4

Answer 17

potassium
sodium
lithium
calcium

Question 18

which metals will react with acids -10

Answer 18

potassium 
sodium 
lithium 
calcium 
magnesium 
aluminium 
zinc 
iron
tin 
lead

Question 19

which metals will react with oxygen (13)

Answer 19

potassium 
sodium 
lithium 
calcium
magnesium 
aluminium 
zinc
iron
tin
lead
copper 
mercury 
silver

Question 20

what is the most reactive

Answer 20

potassium

Question 21

what is the least reactive

Answer 21

gold

Question 22

what does the reactivity of a metal depend upon

Answer 22

how easily it looses an electron

Question 23

to form what

Answer 23

a positive ion

Question 24

what is this positive ion also called

Answer 24

a cation

Question 25

what do metals that react with oxygen produce

Answer 25

metals react with oxygen to produce metal oxides

metal + oxygen -> metal oxide

Question 26

what is an oxidation reaction

Answer 26

one where a substance gains oxygen

Question 27

example of an oxidation reaction including sodium

Answer 27

sodium + oxygen -> sodium oxide

4Na + O2 -> 2Na2O

Question 28

example of an oxidation reaction involving copper

Answer 28

copper + oxygen -> copper oxide

2Cu + O2 -> 2CuO

Question 29

what is a reduction reaction

Answer 29

one where the substance looses oxygen

Question 30

metals more reactive than hydrogen react with what

Answer 30

metals more reactive than hydrogen react with dilute acids

Question 31

when metals more reactive than hydrogen react with dilute acid what is produce

Answer 31

a salt and hydrogen gas

Question 32

what is the word equation for metals (more reactive than hydrogen)reacting with dilute acid

Answer 32

metal + acid -> salt + hydrogen

Question 33

what happens when you react potassium and sodium with acid

Answer 33

explosive reaction occurs that should not be carried out in schools

Question 34

what happens when calcium is reacted with acid

Answer 34

reacts violently to give hydrogen gas

Question 35

what happens when magnesium is reacted with acid

Answer 35

reacts rapidly to give hydrogen gas