Exam (elaborations)
AqA Alevel Chemistry Paper 1 Inorganic and Physical Chemistry June 2023
AqA Alevel Chemistry Paper 1 Inorganic and Physical Chemistry June 2023
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AqAAlevel
Chemistry
Paper 1 Inorganic and Physical Chemistry
Chapter: *07*
1
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
This0 question
1 is about complexes of the transition metal chromium.
0 1 .1 State the meaning of the term transition metal
complex. [1 mark]
Cr(PF3)6 is a complex of chromium that contains molecules of PF3
0 1
.2 The electron pair repulsion theory can be used to predict the shape of a PF 3
molecule. Draw the shape of a PF3 molecule.
Include any lone pairs of electrons that influence the shape.
Name the shape.
[2 marks]
Shape
Name of shape
0 1 .3 Suggest why the oxidation state of chromium is zero in Cr(PF3)6
[1 mark]
*02
IB/M/
* Jun23/7405/1
, 3
Do not write
outside the
The compound [Cr(NH3)4Cl2]Cl contains ammonia box
molecules.
0 1 .4 Deduce the oxidation state of chromium in [Cr(NH3)4Cl2]Cl
[1 mark]
0 1 .5 Name the type of bond between N and H in ammonia.
[1 mark]
0 1
.6 The compound [Cr(NH3)4Cl2]Cl contains a complex ion that shows
isomerism. Draw the two isomers of the complex ion.
State the type of isomerism shown.
[3 marks]
Isomer Isomer
1 2
Type of isomerism
0 1 .7 Complete the equation to show the formation of one complex that
contains chromium in its +3 oxidation state.
[1 mark]
CrCl3 + 5 H2O → 10
*03
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, 4
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outside the
Turn over ►
*03
IB/M/
* Jun23/7405/1
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