Edexcel chemistry 2008 inorganic and organic tables of trends reactions and tests

Includes tables on group one and two carbonate compound thermal stability, halogens in hexane and water, halogens natural physical properties, halogen tests in silver nitrate and further tests in ammonia solution, Potassium halide oxidising power table with all reactions, hot and cold disproportionation reactions and flame colours

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  • Created on: 02-06-11 12:24
Preview of Edexcel chemistry 2008 inorganic and organic tables of trends reactions and tests

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Group 1 Group 2
Group 1 carbonates* are thermally stable ­ you Group 2 carbonates decompose to for an oxide
can't heat them enough with a Bunsen Burner toand carbon dioxide.
make them decompose (although they do under
high temperatures). XCO3 (s) XO(s) + CO2 (g)
*Except Li2CO which decomposes to Li2O and
Group 1 nitrates* decompose to form the nitrite Group 2 nitrates decompose to form the oxide,
and oxygen. nitrogen dioxide and oxygen.
2XNO3 (s) 2XNO2 (s) + O2 (g) 2X(NO3)2 2XO(s) + 4NO2 (g) + O2 (g)
*Except LiNO3 which decomposes for form
Li2O, NO2 and O2.
Group 2 form NO2 and O, or in other words NOO!! Group 1, does not.
Halogens Group 7 solutions Colour in water Colour in Hexane
Chlorine Virtually Colourless Virtually Colourless
Bromine Yellow/orange Orange/red
Iodine Brown Pink/violet
Halogens ­ Group 7 Natural state Colour Physical State
Fluorine Pale Yellow Gas
Chlorine Green Gas
Bromine Red/brown Liquid
Iodine Grey Solid
H+ Halogen ions ­ Group 7 in Silver Nitrate Precipitate
Fluoride F None
Chloride Cl White and dissolves in dilute NH3 (aq)
Bromide Br Cream and dissolves in conc. NH3 (aq)
Iodide I Yellow and will not dissolve in conc. NH3 (aq)

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Potassium KF or KCl KBr KI
Halide with
H2SO4 (l)
Reaction/s Kx(s) + H2SO4 (l) KBr(s)+H2SO4 (l) KHSO4+HBr(g) KI(s)+H2SO4(l) KHSO4(s)+HI(g)
KHSO4 (s) + Hx (g) And And
2HBr(aq)+H2SO4(l) Br2(g)+SO2(g)+2H2 2HI(g)+H2SO4(l) I2(g)+SO2(g)+2H
O(l) 2O(l)
6HI(g)+SO2(g) H2S(g)+3I2(g)+2H2
Change in +6 +4 Reduction +6 +4
Oxidation state +4 2
S Reduction
Change in 1 0 Oxidation 1 0
oxidation state 1 0
Halide Oxidation
Explanation HF or HCl gas The first reaction gives misty HBr The same initial reaction occurs.…read more


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