Reactions that arent useful Flashcards
1
Q
what are fossil fuels
A
hydrocarbons
2
Q
what are hydrocarbons made out of
A
hydrogen and carbon
3
Q
what is the name of reaction when hydrogcarbons are burnt
A
Combustion
4
Q
what is the word equation for combustion
A
hydrocarbon + oxygen ——> CO2 + water
5
Q
Is rainwater an acid and what pH
A
yes and pH 5
6
Q
What metals is rusting corrosive on
A
iron and steel
7
Q
what does corrosion do
A
damage metals due to oxidation
8
Q
what is needed for iron to rust
A
oxygen and water
9
Q
word equation for rust
A
iron + oxygen+ water —-> hydrated iron oxide ( rust)
10
Q
How can you prevent rust
A
paint it or galvanize it
11
Q
what is formed when coal is burnt and what does it do
A
sulphur dioxide and it dissolves in rainwater which causes trees and fish to die
