(a)
Interpretation :
Reaction of lead nitrate and potassium iodide must be classified as precipitation reaction, acid-base reaction or
Concept Introduction :
In precipitation reaction two soluble substances react to produce one insoluble product via double decomposition reaction.
In acid-base reaction salt and water is produced.
In oxidation-reduction reaction change in oxidation number take place.
(a)
Answer to Problem 4RQ
Reaction of lead nitrate and potassium iodide can be classified as precipitation reaction.
Explanation of Solution
In this reaction two soluble salts Pb (NO3)2 and KI produce an insoluble salt which is PbI2. Thus, it is a precipitation reaction.
b)
Interpretation :
Reaction of nitrogen and hydrogen to produce ammonia must be classified as precipitation reaction, acid-base reaction or oxidation-reduction reaction.
Concept Introduction :
In precipitation reaction two soluble substances react to produce one insoluble product via double decomposition reaction.
In acid-base reaction salt and water is produced.
In oxidation-reduction reaction change in oxidation number take place.
b)
Answer to Problem 4RQ
Reaction of nitrogen and hydrogen to produce ammonia can be classified as oxidation-reduction reaction.
Explanation of Solution
In this reaction nitrogen is reduced by hydrogen as the oxidation number of N is changed from 0 (in N2) to -3 (in NH3). The oxidation number of H is increased from 0 (in H2) to +3 (in NH3). Thus, it is an oxidation-reduction reaction.
c)
Interpretation :
Decomposition of KClO3 to produce potassium chloride and oxygen must be classified as precipitation reaction, acid-base reaction or oxidation-reduction reaction.
Concept Introduction :
In precipitation reaction two soluble substances react to produce one insoluble product via double decomposition reaction.
In acid-base reaction salt and water is produced.
In oxidation-reduction reaction change in oxidation number take place.
c)
Answer to Problem 4RQ
Decomposition of KClO3 to produce potassium chloride and oxygen can be classified as oxidation-reduction reaction.
Explanation of Solution
In this reaction oxidation state of Cl is decreased from +5 (in KClO3) to -1 (in KCl). This is a reduction process. Oxidation state of O is increased from -2 (KClO3) to 0 (in O2). It is an oxidation process.
Thus, it is an oxidation-reduction reaction.
d)
Interpretation :
Reaction of hydrofluoric acid and potassium hydroxide to produce potassium fluoride and water must be classified as precipitation reaction, acid-base reaction or oxidation-reduction reaction.
Concept Introduction :
In precipitation reaction two soluble substances react to produce one insoluble product via double decomposition reaction.
In acid-base reaction salt and water is produced.
In oxidation-reduction reaction change in oxidation number take place.
d)
Answer to Problem 4RQ
Reaction of hydrofluoric acid and potassium hydroxide to produce potassium fluoride and water can be classified as acid-base reaction.
Explanation of Solution
In this reaction acid (HF) and base (KOH) react to produce salt (KF) and water.
Thus it is an acid-base reaction.
Chapter 8 Solutions
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