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CCEA GCE AS module 1 summary (units 7-10) $7.19   Add to cart

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CCEA GCE AS module 1 summary (units 7-10)

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These notes cover the second part of the CCEA GCE AS module 1 course (Units 1-7) and were written by me last year to prepare for my AS Chemistry exam in which I got an ‘A’ grade. They are handwritten using GoodNote. This set of notes covers redox reactions, the halogens, titrations and qualitat...

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  • October 28, 2022
  • October 28, 2022
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Chemistry U1





1.7 - Redox
1.8 - Halogens
1.9 - Titrations
1.10 - Qualitative Tests




Patrick Davis, 2022

, Unt 17 Redot
Reduction
+ Oxidation

Oil Condition less, goin
Rig: reduction
· =




Oxidation: Reduction:
©


Gain Loss
of Oxygen
· ·



of oxygen
g hydrogen
Gain
of ↳yerogen
Loss
·
·




·
Loss elections ·
Gain elections
of of
·
Increase in Ovidation State ·
Decrease in oxidation state

Holy equations:
·




Can be used to slow which substores
gain/loss in redox pactions,
·




cy. displacement of copper (I) subote solv
·
Fine with


Reduced
*Note:
[uSOycoph+[ncs> InS0x cap) Cucc electrons should
->
+
Oxidised
correl when i odded
eyes are

=> In (s> -> In
Yog +ze
T
*
Cost ze .In ordised
is


*
Cu cog> SganezcCn reduced
=>
+ 2> Cuc is




CrCog +[ncs) ->Crcs) 2n
og) (Orcall redot equation)
Deicitors:
·




·


Reducing agent:
substance which loses elections
by routing them t

orother substance.
(Reding agent
is
itself OxIDISEDS
reducing agent above, let to
Copper.(I]ions
Zinc the
eg. as it
·
is
gives
Otiching substance which
gon's
electrons
by toting them
·



agent:
from
other substance.
(Otising agent
is
itself REDUCED).
Copper (II) is they takes the zinc.
oiling agents above,
·
are the as 2
from



Oxidation States 1.7

Oxidation state is has
goind/lost
·
the number
a measure
of of a
compound/in
loss
pastic aid state
·
-
of
oil state.
negative
a
·goin of
·
Anconbined elevers are ALWAYS ZERO (0)
ofe: iron oic O
eg: strategy
=



·
fc0: iron (1) Otice: once state th
of
·


fezG =
iron (II) otide =
oid state
of
the




Patrick Davis, 2022

, Oxidation States 2. 1. T


Calculating Oxidation states:
·




1) In an uncombine element, did
state = O

2)The and strates andale
(componend change (eg. neutral 0 Sop=-2).
sum in = =

of
©
3). More destrogetic substone the has vidation state
supound
negatic
in a


Less vitation state.
electronegative politics
4) .
Some element
always have state: the see



Group I
hydrogen (excepthyrides) + 1
·
=




I
Hydides
·
-




Group I alwoys +2.
· =




Group I always +3.
· =




Ogen usually 2 xcept persides 5D one f2O(+2).
·
=
-
in


fluorine:
always I
· -




Chlorine
Usually except compounds with Off where it
·

positic
= -


in is t


variable de 5 O ad ->
being more
elatonegatic
finding Oxidation stres:
·




eg.
Chromium in
Cro
x + 2 =z =22-8=== =>L6 (always inte +/-



Disproportination 1.7
element
Disproportination: Motion were the sous
similiceously
·
a


pidised and reduced



tigh
O

kept
-
It I -
I

Cez + zon -ce-
eg. Reduced,
Oudised =




Did Strate choice: decreased
from 0 to -1, forming Ction
·

a
of
·
Oic. State other clonic: inversal from 0 to +1, forming CIO-io
of
a




Roman Numerals 1.T


·
Roman Numerals: oitation state unknown element in
compound.
y
Chorate (I) =
C10- (1=+1)
eg.
chborate (v) =

<105 (C1=+5).




Patrick Davis, 2022

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