chap 15 reactivity series Flashcards
(29 cards)
1
Q
metal + cold water -> ?
A
metal hydroxide + hydrogen
2
Q
metal + steam -> ?
A
metal oxide + hydrogen
3
Q
metal + hydrochloric acid-> ?
A
metal chloride + hydrogen
4
Q
please
A
potassium
5
Q
send
A
sodium
6
Q
cats
A
calcium
7
Q
monkeys
A
magnesium
8
Q
and
A
aluminium
9
Q
cute
A
carbon
10
Q
zebras
A
zinc
11
Q
in
A
iron
12
Q
the
A
tim
13
Q
large
A
lead
14
Q
hired
A
hydrogen
15
Q
cages
A
copper
16
Q
make
A
mercury
17
Q
sure
A
silver
18
Q
get
A
gold
19
Q
padlock
A
platinum
20
Q
the more reactive a metal is,…?
A
the more difficult it is to reduce its oxide
21
Q
metal carbonate -> ?
(thermal decomposition)
A
metal oxide and carbon dioxide
22
Q
what is corrosion
A
metal reacting with oxygen and water
23
Q
what is rusting
A
the corrosion of iron (hydrated iron (III) oxide)
24
Q
what speeds up rusting
A
presence of sodium chloride and other acidic substances
25
conditions for rusting
oxygen and water
26
problems of rusting (3)
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
27
methods of preventing rusting (2)
remove air or water by creating a barrier, sacrificial protection
28
how does removing air or water by creating a barrier work to prevent rusting
coat object with layer of substance
29
how does sacrificial protection help prevent rusting
using a more reactive metal to react with oxygen and water in place of iron
