Chemistry Reference
In-Depth Information
Inorganic carbon chemistry
●
Additional questions
1
This question is about the limestone cycle.
e (i)
What is the 'greenhouse effect'?
(ii)
Discuss the possible consequences of the
greenhouse effect if nothing is done to
counteract it.
heat
Compound
A
+ Carbon dioxide
Limestone
3
Limestone is an important raw material used in
many different industries.
a
One of the properties of limestone is that it
reacts with acids.
(ii)
Why do farmers spread powdered limestone
on their fields?
(ii)
How can buildings made of limestone be
affected by 'acid rain'?
(iii)
Write an ionic equation which would
represent the reactions taking place in both
(ii)
and
(ii)
.
b
Limestone is used in the manufacture of iron
(Chapter 10, p. 158).
(ii)
Why is it added to the blast furnace along
with coke and haematite?
(ii)
Write chemical equations for the reactions it
is involved in, in this process.
c (i)
Name a building material made by heating
a mixture of limestone and clay in a
rotary kiln.
(ii)
What substance is the dry product produced
in the rotary kiln added to?
Explain why this substance is added.
CO
2
(g)
water
water
Limewater
Compound
B
('slaked lime')
a
Name and give the formula of:
(ii)
compound
A (ii)
compound
B
.
b
Write balanced chemical equations for the
formation of both compounds
A
and
B
.
c
Name and give the symbol/formula for the ions
present in limewater.
d
Describe with the aid of a balanced chemical
equation what happens if carbon dioxide is bubbled
through limewater until there is no further change.
2
The diagram shown below is a simplified version of
the carbon cycle.
carbon
dioxide
in the air
4
dissolves in water
Carbon dioxide
Acid
A
A
B
D
animals eat
plants
bubbled through
calcium hydroxide
solution
carbon
compounds
in animals
carbon
compounds
in plants
+ burning
magnesium
C
White precipitate
D
White solid
B
+ carbon
fuels
a
Name the processes
A
,
B
,
C
and
D
.
b
Write balanced chemical equations to represent
the processes taking place in
A
and
B
.
c
There are a number of fuels which could be
placed in the 'fuels' box. Name three such fuels.
d
'The air contains approximately 0.03% of carbon
dioxide and this amount is almost constant.'
Explain why this is a true statement.
further bubbling
of carbon dioxide
+ water
Colourless solution
E
Alkaline solution
C
a
Name and give the formulae of substances
A
to
E
.
