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Summary AQA A Level Chemistry - all reactions you should be familiar with

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There are lots of random reactions in AQA A level chemistry that appear throughout the course, which could come up in your exams. Whilst it's not essential to have all of these equations memorised, being familiar with these equations will surely have a great impact on your performance, allowing you...

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Uploaded on June 12, 2023
Number of pages 4
Written in 2020/2021
Type Summary

a level
chemistry
aqa
reactions
reactions with water
reactions with oxygen
reactions of chlorine
reduction of vanadium
manganate titrations
hydrolysis
ozone depletion
bioet
partial ligand substitution

Study Level
A/AS Level
Examinator
AQA
Subject
A Level Chemistry
Unit
All units (7405)

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Inorganic Chemistry
Reactions of Group 2 Elements with Water
• Mg + H2O ! MgO + H2 (with steam)
• Mg + 2H2O ! Mg(OH)2 + H2 (with warm water)
• Ca + 2H2O ! Ca(OH)2 + H2
• Sr + 2H2O ! Sr(OH)2 + H2
• Ba + 2H2O ! Ba(OH)2 + H2

Uses of Group 2 Elements
• TiCl4 (g) + 2Mg (l) ! Ti (s) + 2MgCl2 (l) (Extraction of titanium with magnesium)
• Mg(OH)2 + 2HCl ! MgCl2 + 2H2O (Magnesium hydroxide in medicine)
• Ca(OH)2 + CO2 ! CaCO3 + H2O (Limewater testing for CO2)
• CaO (s) + 2H2O (l) + SO2 (g) ! CaSO3 (s) + 2H2O (l) (Removing SO2 with CaO)
• CaCO3 (s) + 2H2O (l) + SO2 (g) ! CaSO3 (s) + 2H2O (l) + CO2 (g) (Removing SO2 with CaCO3)

Reactions of Group 7 Elements with Sulfuric Acid
• NaCl (s) + H2SO4 (l) ! NaHSO4 (s) + HCl (g) (white misty HCl fumes)

• NaBr(s) + H2SO4 (l) ! NaHSO4 (s) + HBr (g) (white misty HBr fumes)
• 2HBr (aq) + H2SO4 (l) ! Br2 (aq) + SO2 (g) + 2H2O (l) (choking, colourless SO2 / orange Br2 liquid)

• NaI(s) + H2SO4 (l) ! NaHSO4 (s) + HI (g) (white misty HI fumes)
• 2HI (aq) + H2SO4 (l) ! I2 (aq) + SO2 (g) + 2H2O (l) (choking, colourless SO2, purple I2 vapour)
• 6HI (g) + SO2 (g) ! H2S (g) 3I2 (g) 2H2O (l) (bad smells of H2S)
• 4HI (g) + SO2 (g) ! S (s) 3I2 (g) 2H2O (l) (yellow S solid

Reactions of Chlorine
• Cl2 (g) + H2O (l) ⇌ HClO (aq) + HCl (aq)
• (in sunlight) 2Cl2 (g) + 2H2O (l) ! 4HCl(aq) + O2 (g)
• Cl2 (g) + 2NaOH(aq) ! NaClO(aq) + NaCl(aq) + H2O (cold, dilute, aqueous NaOH)

Reactions of Period 3 Elements with Oxygen
• 4 Na + O2 ! 2 Na2O (yellow flame, white solid, vigorous)
• 2 Mg + O2 ! 2 MgO (white flame, white solid, vigorous)
• 4 Al + 3 O2 ! 2 Al2O3 (white flame, white solid, slow)
• Si + O2 ! SiO2 (white flame, white solid, slow)
• P4 + 5 O2 ! P4O10 (white flame, white solid, spontaneously combusts)
• S + O2 ! SO2 (pale blue flame, colourless gas, burns steadily)
• 2 S + 3 O2 ! 2 SO3 (pale blue flame, colourless gas, burns steadily)

Reactions of Period 3 Oxides with Water
• Na2O + H2O ! 2 NaOH (NaOH strong base)
• MgO + H2O ! Mg(OH)2 (Mg(OH)2 sparingly soluble)
• P4O10 + 6 H2O ! 4 H3PO4 (H3PO4 weak acid with many H+ ions)
• SO2 + H2O ! H2SO3 (H2SO3 weak acid)
• SO3 + H2O ! H2SO4 (H2SO4 strong acid)

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