
(a)
Interpretation:The chemical equation of any reaction that occur in exercise 3 and 4 needs to be written.
Concept Introduction : A
(a)

Answer to Problem 5E
The chemical equation for the reaction in exercise 2 is,
Explanation of Solution
To write the chemical equation for the reaction in exercise 2, “if iron nitrate were combined with solid zinc, zinc nitrate will be generated” we must know the formula of the reactants and the products.
Chemical formula of iron nitrate is
Therefore, the chemical equation for the reaction is,
(b)
Interpretation:The net ionic equation for the reaction needs to be written.
Concept Introduction : A chemical reaction is a symbolic representation of how reactants react in presence of adequate amount of temperature and reaction medium to generate a product.
An ionic reaction is a symbolic representation of how ions reacts in a chemical reaction.
(b)

Answer to Problem 5E
The net ionic equation for the reaction is,
Explanation of Solution
The net ionic equation for the reaction
Here,
(c)
Interpretation: The most active metal needs to be identified.
Concept Introduction : The reactivity series of metal in the order of increasing reactivity is,
Gold < Silver < Mercury < Bismuth < Antimony < Hydrogen < Lead < Tin < Nickel < Cobalt < Cadmium < Iron < Chromium < Zinc < Manganese < Aluminium < Calcium < Strontium < Barium < Lithium < Sodium < Potassium
(c)

Answer to Problem 5E
Zn is more active than Fe in the reaction,
Explanation of Solution
The activity series of metal in the order of increasing reactivity is,
Gold < Silver < Mercury < Bismuth < Antimony < Hydrogen < Lead < Tin < Nickel < Cobalt < Cadmium < Iron < Chromium < Zinc < Manganese < Aluminium < Calcium < Strontium < Barium < Lithium < Sodium < Potassium
This reactivity series implies that a metal with high reactivity can displace a metal with a low reactivity.
From the above series, we can conclude that Zn is most active in the reaction,
(d)
Interpretation: The oxidized and reduced metal needs to be determined.
Concept Introduction:The activity series of metal in the order of increasing reactivity is,
Gold < Silver < Mercury < Bismuth < Antimony < Hydrogen < Lead < Tin < Nickel < Cobalt < Cadmium < Iron < Chromium < Zinc < Manganese < Aluminium < Calcium < Strontium < Barium < Lithium < Sodium < Potassium
(d)

Answer to Problem 5E
Zn is oxidized and iron is reduced in the reaction,
Explanation of Solution
In the reaction,
Zinc is more active than Fe according to the following activity series,
Gold < Silver < Mercury < Bismuth < Antimony < Hydrogen < Lead < Tin < Nickel < Cobalt < Cadmium < Iron < Chromium < Zinc < Manganese < Aluminium < Calcium < Strontium < Barium < Lithium < Sodium < Potassium
Therefore, in the reaction Zn donates electrons and
Chapter U5 Solutions
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