(a)
Interpretation:
The given half reaction should be balanced
Concept Introduction:
The oxidation and reduction can be identified by change in oxidation state. If oxidation state of atom of an element increases, it undergoes oxidation and if it decreases, it undergoes reduction.
The general
Here,
Similarly,
Here,
Answer to Problem 41QAP
Explanation of Solution
The given half reaction is as follows:
In the above reaction, oxidation state of copper is zero in solid state, it get oxidized to
Thus, to balance the above reaction, 2 electrons are added to right side of the reaction.
(b)
Interpretation:
The given half reaction should be balanced
Concept Introduction:
The oxidation and reduction can be identified by change in oxidation state. If oxidation state of atom of an element increases, it undergoes oxidation and if it decreases, it undergoes reduction.
The general oxidation and reduction half reactions are as follows:
Here,
Similarly,
Here,
Answer to Problem 41QAP
Explanation of Solution
The given half reaction is as follows:
In the above reaction, oxidation state of iron is + 3 in reactant side, it gets reduced to
Thus, to balance the above reaction, 1 electron is added to left side of the reaction.
(c)
Interpretation:
The given half reaction should be balanced
Concept Introduction:
The oxidation and reduction can be identified by change in oxidation state. If oxidation state of atom of an element increases, it undergoes oxidation and if it decreases, it undergoes reduction.
The general oxidation and reduction half reactions are as follows:
Here,
Similarly,
Here,
Answer to Problem 41QAP
Explanation of Solution
The given half reaction is as follows:
In the above reaction, oxidation state of bromine is -1 in reactant side, it gets oxidized to
Thus, 1 electron is added to right side of the reaction.
Now, to balance the atoms give coefficient 2 to
To balance the charge, 1 more electron is added to right side, thus, the balanced half reaction will be:
(d)
Interpretation:
The given half reaction should be balanced
Concept Introduction:
The oxidation and reduction can be identified by change in oxidation state. If oxidation state of atom of an element increases, it undergoes oxidation and if it decreases, it undergoes reduction.
The general oxidation and reduction half reactions are as follows:
Here,
Similarly,
Here,
Answer to Problem 41QAP
Explanation of Solution
The given half reaction is as follows:
In the above reaction, oxidation state of iron is + 2 in reactant side, it gets reduced to
Thus, to balance the above reaction, 2 electrons are added to left side of the reaction.
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Chapter 18 Solutions
Introductory Chemistry: A Foundation
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- Describe what you expect to happen when the following solutions are electrolyzed: a aqueous Na2SO4; b aqueous KBr. That is, what are the electrode reactions? What is the overall reaction?arrow_forwardWrite balanced equations for the following half-reactions. Specify whether each is an oxidation or reduction. (a) H2O2(aq) O2(g)(in acid) (b) H2C2O4(aq) CO2(g)(in acid) (c) NO3(aq) NO(g)(in acid) (d) MnO4(aq) MnO2(s)(in base)arrow_forwardGold can be dissolved from gold-bearing rock by treating the rock with sodium cyanide in the presence of oxygen. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O() 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Name the oxidizing and reducing agents in this reaction. What has been oxidized, and what has been reduced? (b) If you have exactly one metric ton (1 metric ton = 1000 kg) of gold-bearing rock, what volume of 0.075 M NaCN, in liters, do you need to extract the gold if the rock is 0.019% gold?arrow_forward
- For the reaction Cu2+(aq) + Zn(s) → Cu(s) + Zn2+ (aq), why can’t you generate electric current by placing a piece of copper metal and a piece of zinc metal in a solution containing CuCl2(aq) and ZnCl2(aq)?arrow_forwardAssign an oxidation number to the underlined atom in each ion or molecule. (a) Fe2O3, (b) H2SO4, (C) CO32- (C) NO2+arrow_forwardWrite balanced equations for the following half-reactions. Specify whether each is an oxidation or reduction. (a) Cr(s) Cr3+(aq)(in acid) (b) AsH3(g) As(s)(in acid) (c) VO3(aq) V2+(aq)(in acid) (d) Ag(s) Ag2O(s)(in base)arrow_forward
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