learning aim b investigate oxidation reduction reactions in order to understand their many applications in analysis b1 displacement reactions and electrochemical cells • oxidation defined in terms of
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BTEC
PEARSON (PEARSON)
Applied Science 2016 NQF
Unit 13 - Applications of Inorganic Chemistry
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Oxidation/Reduction equation worksheet
For the following six reactions, identify the oxidation numbers of the elements in the elements
and compounds involved.
From this, determine which equations are examples of redox reactions and which are not.
Redox Reaction Not a Redox Reaction
Oxidation
Reduction
1. NaCl (aq) + AgNO3 (aq) AgCl (s) + NaNO3 (aq)
LHS: OS
Na=+1
Cl=-1
Ag=+1
N=+5
O=-2
RHS: OS
Na=+1
Cl=-1
Ag=+1
N=+5
O=-2
Not a Redox Reaction
2. H2 (aq) + F2 (aq) 2HF (aq)
LHS:
H2= 0
F2=0
RHS:
2H=+1
F=-1
H2 = 2H oxidation
F2=F reduction
Redox reaction
3. PCl5 (aq) + 4H2O (l) H3PO4 (aq) + 5HCl (aq)
LHS:
1
, P= +5
Cl5=-1
4H2=+1
O=-2
P+ (5 x Cl) = 0
P+ (5x-1)=0
P+(-5)=0
P=+5
RHS:
H3=+1
P= +5
O4=-2
5H= +1
Cl=-1
(3xH) + P + (4 x 0) = 0
(3) + P (4x-2) = 0
(3) + P (-8) = 0
P + (-5) = 0
P = +5
9. I2 + 2e- 2I- (Reduction - Oxidation number of I changed from 0 to -1.
Gained 2 electrons)
2S2O32- S4O62- (aq) + 2e- (Oxidation - Oxidation number of S changed from
+2 to +2.5. Lost two electrons)
4
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