chemistry

Question 1

examples of metals found as pure metals in nature+ name of state

Answer 1

silver and gold, free state

Question 2

how metals can be obtained from ores

Answer 2

extraction

Question 3

how metals can be extracted from their ores

Answer 3

heating the metal ore alone
heating the metal ore with carbon(carbon reduction)
electrolysis of the molten ore

Question 4

the relationship between the difficulty of extracting the metal and the time of discovery

Answer 4

the earlier the easier

Question 5

factors affecting the availability of a metal

Answer 5

the abundance of the metal in the earth’s crust
ease and cost of mining the ore
ease and cost of extracting the metal from its core

Question 6

how to conserve metals

Answer 6

reuse, reduce, recycle :/

Question 7

What is reactivity

Answer 7

The readiness of it to react with other substances

Question 8

What is the metal reactivity series?

Answer 8

A series of common metals arranged in decreasing order of reactivity

Question 9

What is a chemical equation?

Answer 9

shows the physical states and relative numbers of particles of the reactants and products in a chemical reaction

Question 10

What is displacement in a reaction

Answer 10

A metal higher in the reactivity series will displace any metal lower in the solution of a compound

Question 11

Why does displacement happen

Answer 11

A more reactive metal loses electrons more readily

Question 12

What is an ionic equation?

Answer 12

Equation that includes kind formed or changed during the reaction

Question 13

What depends on the method used to extract a metal from ores

Answer 13

The position of it in the reactivity series

Question 14

What is the relationship between the position of the metal in the reactivity series and the difficulty of extracting it from its ore

Answer 14

The lower the easier

Question 15

Bauxite

Answer 15

Aluminum

Question 16

Copper pyrite

Answer 16

Copper

Question 17

Haematite

Answer 17

Iron

Question 18

Galena

Answer 18

Lead

Question 19

Cinnabar

Answer 19

Mercury

Question 20

the factors of the reactivities of metals

Answer 20

the lowest temperature at which the reaction starts
the rate of reaction
the amount of heat given out during the reaction

Question 21

the metal reactivity series

Answer 21

k na ca mg al zn fe pb cu hg ag au

Question 22

what happens if metals in the reactivity series are in contact with water or steam

Answer 22

k na ca react with water, mg al zn reacts with steam, the rest are unreactive

Question 23

which metals require gentle heating for a reaction to occur

Answer 23

k,na

Question 24

which metals require strong heating for a reaction to occur

Answer 24

ca,mg,al,zn,fe,pb

Question 25

which metals require v. strong heating for a reaction to occur

Answer 25

cu,hg

Question 26

which metals have no observable change in very strong heating

Answer 26

ag,pt,au

Question 27

which metals can burn

Answer 27

k,na,ca,mg,al,zn,fe

Question 28

which metals do not burn

Answer 28

pb,cu,hg

Question 29

which metals have no reaction

Answer 29

ag,pt,au

Question 30

potassium heating observations

Answer 30

burns vigorously, lilac flame, produces white powder

Question 31

sodium heating observations

Answer 31

burns vigorously,golden yellow flame, produces white powder

Question 32

ca heating observations

Answer 32

burns vigorously, brick red flame, produces white powder

Question 33

Mg heating observations

Answer 33

burns with bright white flame, produces white powder

Question 34

Al heating observations

Answer 34

burns to give out much heat, forms white powder

Question 35

zinc heating observations

Answer 35

burns to give heat powder is formed, yellow when hot, white when cold

Question 36

Fe heating observations

Answer 36

burns with yellow sparks produces black solid

Question 37

pb heating observations

Answer 37

melts when heated, powder forms on the surface, orange when hot, yellow when cold

Question 38

Copper heating observations

Answer 38

surface becomes black after heating

Question 39

mercury heating observations

Answer 39

has a red powder form on the surface

Question 40

ag,pt,au heating observations

Answer 40

no observable change

Question 41

k,na,ca metals react with cold water to produce

Answer 41

metal hydroxide and hydrogen

Question 42

mg,al,zn,fe react with steam to produce

Answer 42

metal oxide and hydrogen

Question 43

metals from pb

Answer 43

dont do anything:/ no reaction

Question 44

products of k,na,ca metals with cold water

Answer 44

metal hydroxide and hydrogen

Question 45

products of mg,al,zn,fe with steam

Answer 45

produce metal oxide and hydrogen

Question 46

metals from pb

Answer 46

dont do anything:/

Question 47

metals k,na with acid

Answer 47

explosive reaction

Question 48

metal+hydrochloric acid=

Answer 48

metal chloride+hydrogen

Question 49

metal+dilute sulphuric acid=

Answer 49

metal sulphate+hydrogen

Question 50

ca,mg,al,zn,fe react with dilute acid

Answer 50

more slowly down the series

Question 51

pb with dilute acid

Answer 51

very slow reaction

Question 52

metals below cu with dilute acid

Answer 52

no reaction