reactivity series

Question 1

metal + cold water -> ?

Answer 1

metal hydroxide + hydrogen

Question 2

metal + steam -> ?

Answer 2

metal oxide + hydrogen

Question 3

metal + hydrochloric acid-> ?

Answer 3

metal chloride + hydrogen

Question 4

please

Answer 4

potassium

Question 5

send

Answer 5

sodium

Question 6

cats

Answer 6

calcium

Question 7

monkeys

Answer 7

magnesium

Question 8

and

Answer 8

aluminium

Question 9

cute

Answer 9

carbon

Question 10

zebras

Answer 10

zinc

Question 11

in

Answer 11

iron

Question 12

the

Answer 12

tim

Question 13

large

Answer 13

lead

Question 14

hired

Answer 14

hydrogen

Question 15

cages

Answer 15

copper

Question 16

make

Answer 16

mercury

Question 17

sure

Answer 17

silver

Question 18

get

Answer 18

gold

Question 19

padlock

Answer 19

platinum

Question 20

the more reactive a metal is,…?

Answer 20

the more difficult it is to reduce its oxide

Question 21

metal carbonate -> ?
(thermal decomposition)

Answer 21

metal oxide and carbon dioxide

Question 22

what is corrosion

Answer 22

metal reacting with oxygen and water

Question 23

what is rusting

Answer 23

the corrosion of iron (hydrated iron (III) oxide)

Question 24

what speeds up rusting

Answer 24

presence of sodium chloride and other acidic substances

Question 25

conditions for rusting

Answer 25

oxygen and water

Question 26

problems of rusting (3)

Answer 26

costs a lot of money to replace corrode structures, rust is brittle lead to safety issue, steel water tanks of HDB flats rust, polluting drinking water

Question 27

methods of preventing rusting (2)

Answer 27

remove air or water by creating a barrier, sacrificial protection

Question 28

how does removing air or water by creating a barrier work to prevent rusting

Answer 28

coat object with layer of substance

Question 29

how does sacrificial protection help prevent rusting

Answer 29

using a more reactive metal to react with oxygen and water in place of iron