AQA AS Chemistry Paper 1: Inorganic and Physical Chemistry Exam Questions With Correct Answers
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Course
AQA AS Chemistry
Institution
AQA AS Chemistry
AQA AS Chemistry Paper 1: Inorganic and
Physical Chemistry Exam Questions With
Correct Answers
Give the full electron configuration of an Al atom and a Cr3+ ion - answer1s2 2s2 2p6 3s2 3p1
1s 2s2 2p6 3s2 3p6 3d6
Deduce the formula of the ion that has a charge 2+ with the same electron - answer...
AQA AS Chemistry Paper 1: Inorganic and
Physical Chemistry Exam Questions With
Correct Answers
Give the full electron configuration of an Al atom and a Cr3+ ion - answer✔1s2 2s2 2p6 3s2 3p1
1s 2s2 2p6 3s2 3p6 3d6
Deduce the formula of the ion that has a charge 2+ with the same electron - answer✔Sr2+
Deduce the formula of the compound that contains 2+ ions and 3- ions that both have the same
electron configuration as argon - answer✔CaP
Deduce which of Na+ and Mg2+ is the smaller ion 2 marks - answer✔Mg 2+
Both have the same number of shielding however Mg2+ has more protons so higher nuclear
charge and so stronger attraction between out electrons and nucleus so smaller atomic radius
First ionisation of sodium - answer✔Na(g) -> Na+ + e-
Explain why the first ionisation of sulfur is lower than phosphorus 4 marks - answer✔Sulfur has
a pair of electrons in its 3p orbital
Phosphorus has 3 unpaired electrons in its 3p orbital
Pair of electrons repel and electron is easily removed
Less energy is needed to remove the electron
This question is about a white solid MHCO3 that dissolves in water and reacts with HCl to give a
salt
Samples of the solution were titrated
Student identified burette as the largest source of uncertainty in the experiment. Suggest how the
procedure could be improved to reduce the percentage uncertainty in using the burette
- add distilled water
- stir with glass rod
- rinse all remaining solid from sample bottle into flask
- transfer to volumetric flask with 250 cm3 mark
- with washing make up to 250 cm3
- shake
Melting point Boiling point
Br 266. 332
Mg 923. 1383
In terms of structure and bonding explain why the bop of Br is different from Mg. Suggest why
Mg is a liquid over a much greater temperature range compared to Br 5 marks - answer✔1) Br is
a simple molecular structure
2) Mg is a metallic structure
3) Br2 weak van der waals forces between molecules
4) more energy needed to over come stronger metallic bonds
5) Mg greater liquid range because forces of attraction in molten metal stronger than Br2
Explain how ions are accelerated, detected and have their abundance determined in the time of
flight (TOF) mass spectrometer - answer✔Ions accelerated by electric field
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