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# Solved: Determine whether each reaction is a redox reaction. For those reactions that

ISBN: 9780321910295 34

## Solution for problem 96P Chapter 16

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition

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Problem 96P

Determine whether each reaction is a redox reaction. For those reactions that are redox reactions, identify the substance being oxidized and the substance being reduced.

(a) $$\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}(a q)+2 \mathrm{LiCl}(a q) \longrightarrow$$

(b) $$2 \mathrm{HBr}(a q)+\mathrm{Ca}(\mathrm{OH})_{2}(a q) \longrightarrow 2 \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{CaBr}_{2}(a q)$$

(c) $$2 \mathrm{Al}(s)+\mathrm{Fe}_{2} \mathrm{O}_{3}(s) \longrightarrow \mathrm{Al}_{2} \mathrm{O}_{3}(s)+2 \mathrm{Fe}(l)$$

(d) $$\mathrm{Na}_{2} \mathrm{O}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow 2 \mathrm{NaOH}(a q)$$

Step-by-Step Solution:

Solution 96P :

Step 1:

Here, we have to determine whether each reaction is a redox reaction and identify the substance being oxidized and the substance being reduced for redox reactions :

We identify if the given reaction is redox reaction by looking at its oxidation numbers. If the oxidation numbers of the atoms in the reaction has changed then it’s a redox reaction. If the atom’s oxidation number increases then the atom is oxidized and if the atom’s oxidation number decreases then its reduced.

(a) Pb(NO3)2(aq) + 2 LiCl(aq) → PbCl2(s) + 2 LiNO3(aq) :

Let’s assign the oxidation numbers for the atoms here :

Pb(NO3)2(aq) + 2 LiCl(aq) → PbCl2(s) + 2 LiNO3(aq)

(+2) (-12)         (+1)( -1)    (+2)(-12)    (+1)( -1)

We know for a neutral atom, the sum of the oxidation numbers should be zero.

Here, in the equation : The oxidation number of NO3 is -1 and since there are 2 atoms of NO3, the oxidation number will be -2 and to counteract that Pb will have the oxidation number of +2. The oxidation number of Cl is -1 and to counteract that Li will have charge of +1. Similarly the oxidation numbers are for PbCl2 and LiNO3. Here, we see there were no change of oxidation numbers of atoms anywhere, Hence this is not a redox reaction.

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##### ISBN: 9780321910295

Since the solution to 96P from 16 chapter was answered, more than 2698 students have viewed the full step-by-step answer. The answer to “?Determine whether each reaction is a redox reaction. For those reactions that are redox reactions, identify the substance being oxidized and the substance being reduced.(a) $$\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}(a q)+2 \mathrm{LiCl}(a q) \longrightarrow$$(b) $$2 \mathrm{HBr}(a q)+\mathrm{Ca}(\mathrm{OH})_{2}(a q) \longrightarrow 2 \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{CaBr}_{2}(a q)$$(c) $$2 \mathrm{Al}(s)+\mathrm{Fe}_{2} \mathrm{O}_{3}(s) \longrightarrow \mathrm{Al}_{2} \mathrm{O}_{3}(s)+2 \mathrm{Fe}(l)$$(d) $$\mathrm{Na}_{2} \mathrm{O}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow 2 \mathrm{NaOH}(a q)$$” is broken down into a number of easy to follow steps, and 53 words. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. The full step-by-step solution to problem: 96P from chapter: 16 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. This full solution covers the following key subjects: Being, substance, redox, reactions, reaction. This expansive textbook survival guide covers 19 chapters, and 2046 solutions.

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Solved: Determine whether each reaction is a redox reaction. For those reactions that