Concept explainers
(a)
Interpretation:
For the given reactions, the equation has to be completed and balanced.
Concept Introduction:
Combustion reaction is the one in which, the substance is burnt in presence of oxygen. If any hydrocarbon is burnt in presence of oxygen, the products obtained are carbon dioxide and water only.
(a)
Answer to Problem 23.32QP
The balanced equation for the given reaction can be written as,
Explanation of Solution
The given reaction in the problem statement is an combustion reaction and hence, the product obtained will be carbon dioxide and water only. Hence, the raw equation can be written as,
As the total number of atoms present in both reactants and products must be equal, balancing has to be done. To balance the carbon atom in both sides, the product side has to be multiplied by 4 for carbon dioxide and 5 for water. This leads, balancing of both carbon and hydrogen atoms on both sides.
Oxygen count was thirteen in product side. But in the reactant side it is two. Hence, multiplying by 13/2 on reactant side balances the oxygen atom also on both sides. Therefore, the balanced chemical equation for the given reaction can be given as,
To remove the fraction multiply all the compounds by 2. This gives the balanced equation as,
The given incomplete combustion reaction is completed and the balanced chemical equation also written.
(b)
Interpretation:
For the given reactions, the equation has to be completed and balanced.
Concept Introduction:
Oxidation is loss of electron by a species. This also can be said as addition of oxygen. Reduction is a process in which electrons are gained by a species.
(b)
Answer to Problem 23.32QP
The balanced equation for the given reaction can be written as,
Explanation of Solution
Reduction: MnO4− → MnO2
Balance O: MnO4− + 2H2O → MnO2 + 4OH−
Balance charge: MnO4− + 2H2O + 3e− → MnO2 + 4OH−
Add half-reactions:
Therefore, the complete equation for the given reaction can be given as,
The balanced equation for the given reaction was written.
(c)
Interpretation:
For the given reactions, the equation has to be completed and balanced.
Concept Introduction:
Bromination of
(c)
Answer to Problem 23.32QP
The balanced equation for the given reaction can be written as,
Explanation of Solution
Bromination across the double bond.
The given bromination reaction was completed and the product was written with balanced equation.
(d)
Interpretation:
For the given reactions, the equation has to be completed and balanced.
Concept Introduction:
Nitration of
(d)
Answer to Problem 23.32QP
The balanced equation for the given reaction can be written as,
Explanation of Solution
Nitration of ethylbenzene takes place in presence of nitric acid and sulphuric acid. As ethyl is a para directing group, the nitro group is substituted in the para position. By considering this, the complete reaction can be given as,
The given nitration reaction product was drawn and the equation was completed.
(e)
Interpretation:
For the given reactions, the equation has to be completed and balanced.
Concept Introduction:
Chlorination of aromatic compound happens in presence of catalyst. Usually this does not occur in absence of catalyst. The position of chlorination in the aromatic ring depends upon the group already substituted in the ring.
(e)
Answer to Problem 23.32QP
The balanced equation for the given reaction can be written as,
Explanation of Solution
Chlorination of benzene takes place in presence of catalyst with chlorine. By considering this, the complete reaction can be given as,
The given chlorination reaction was completed and the product was written with balanced equation.
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Chapter 23 Solutions
General Chemistry - Standalone book (MindTap Course List)
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