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463992
Period 3 and Redox Equilibria
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A-Levels A2 CHEM5 Mind Map on Period 3 and Redox Equilibria, created by rachel-stephen on 05/01/2014.
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a2 chem5
a-levels
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rachel-stephen
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rachel-stephen
over 10 years ago
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rachel-stephen
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rachel-stephen
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rachel-stephen
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Copied by
rachel-stephen
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Copied by
rachel-stephen
over 10 years ago
Copied by
rachel-stephen
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Copied by
rachel-stephen
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Copied by
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Resource summary
Period 3 and Redox Equilibria
Standard Electrode Potentials
Period 3 Elements
Reaction with water
Annotations:
Na is in group 1 and Mg is in group 2 so when reacting with water Na loses 1 electron to form Na+ ion while Mg loses 2 electrons to form Mg 2+ ions.
It takes less energy to lose one electron than to lose 2 electrons so Na is more reactive than Mg.
More energy (usually heat) is needed for Mg to react.
Sodium
Annotations:
Reacts vigorously with cold water.
Forms a molten ball on the surface.
Fizzes
Produces H2 gas.
Magnesium
Annotations:
Reacts very slowly with cold water
Can't see any reaction
Forms a weak alkaline solution (pH 9 - 10).
The solution only produce a weak alkaline solution because Mg is not very soluble in water, so relatively few hydroxide ions are formed.
Mg reacts much faster with steam (where there is more energy) to form Mg oxide.
Electrode Potentials
Redox Equations
Period 3 Oxides
Electrochemical Series
Electrochemical Cells
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