C.12- Sulfur Flashcards
1
Q
uses of sulfur?
A
making sulphuric acid
1
Q
low melting point of sulfur?
A
115
2
Q
properties of sulfur?
A
- yellow solid
- 16 protons
- metal sulfide ores
- crude oil
- non metal
3
Q
what does sulfur dioxide do?
A
- cause acid rain
-burns in the air
4
Q
what is sulphuric acid obtained from?
A
sulfide ores
5
Q
what is the process called?
A
contact process
6
Q
what elements are in the process?
A
sulfur, air and water
7
Q
first step of the contact process?
A
S + O2- SO2
- sulfur dioxide is formed
- burned in a furnace in dry air
8
Q
second step of the contact process?
A
2SO2 + O2 = 2SO3
- makes sulfur trioxide
- cooled
- reacts w more air
- vanadium oxide - catalyst
- 450 atmospheric pressure
-exothermic
9
Q
third step of the contact process?
A
H2SO4 + SO3 - H2S2O7
- makes oleum
- oleum then makes sulphuric acid
10
Q
fourth step of the contact process?
A
H2S2O7 + H20 - H2SO4
- reacts with water
- makes sulphuric acid
11
Q
sulphuric acid - chem reactions?
A
- U.I- red
- Metal oxide= salt + water
- Metal= salt +hydrogen
- Metal carbonate = salt + water + carbon dioxide
12
Q
sulphuric acid - uses?
A
- paint
-dyes - fertiliser
- plastic
-fibres
