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(a)
Interpretation:
The given
Concept Introduction:
In a chemical equation when the number of atoms of an element on the left-hand side is equal to the number of atoms of that element on the right-hand side, it is known as a balanced chemical equation. The balancing of a chemical equation is done to follow the law of conservation of mass.
(b)
Interpretation:
The given oxidation-reduction reaction is to be balanced.
Concept Introduction:
In a chemical equation when the number of atoms of an element on the left-hand side is equal to the number of atoms of that element on the right-hand side, it is known as a balanced chemical equation. The balancing of a chemical equation is done to follow the law of conservation of mass.
(c)
Interpretation:
The given oxidation-reduction reaction is to be balanced.
Concept Introduction:
In a chemical equation when the number of atoms of an element on the left-hand side is equal to the number of atoms of that element on the right-hand side, it is known as a balanced chemical equation. The balancing of a chemical equation is done to follow the law of conservation of mass.
(d)
Interpretation:
The given oxidation-reduction reaction is to be balanced.
Concept Introduction:
In a chemical equation when the number of atoms of an element on the left-hand side is equal to the number of atoms of that element on the right-hand side, it is known as a balanced chemical equation. The balancing of a chemical equation is done to follow the law of conservation of mass.
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Chapter 7 Solutions
Introductory Chemistry: A Foundation
- Atomic masses can be determined by electrolysis. In one hour, a current of 0.600 A deposits 2.42 g of a certain metal, M, which is present in solution as M+ ions. What is the atomic mass of the metal?arrow_forwardWhat is electrochemistry? What are redox reactions? Explain the difference between a galvanic and an electrolytic cell.arrow_forwardThe Nernst equation allows determination of the cell potential for a galvanic cell at nonstandard conditions. Write out the Nernst equation. What are nonstandard conditions? What do , n, and Q stand for in the Nernst equation? What does the Nernst equation reduce to when a redox reaction is at equilibrium? What are the signs of G and when K 1? When K 1? When K = 1? Explain the following statement: determines spontaneity, while determines the equilibrium position. Under what conditions can you use to predict spontaneity?arrow_forward
- The iron content of hemoglobin is determined by destroying the hemoglobin molecule and producing small water-soluble ions and molecules. The iron in the aqueous solution is reduced to iron(II) ion and then titrated against potassium permanganate. In the titration, iron(ll) is oxidized to iron(III) and permanganate is reduced to manganese(II) ion. A 5.00-g sample of hemoglobin requires 32.3 mL of a 0.002100 M solution of potassium permanganate. The reaction with permanganate ion is MnO4(aq)+8H+(aq)+5Fe2+(aq)Mn2+(aq)+5Fe3+(aq)+4H2O What is the mass percent of iron in hemoglobin?arrow_forwardThe Ostwald process for the commercial production of nitric acid involves the following three steps: 4NH3(g)+5O2(g)4NO(g)+6H2O(g) 2NO(g)+O2(g)2NO2(g) 3NO2(g)+H2O(l)2HNO3,(aq)+NO(g) a. Which reactions in the Ostwald process are oxidationreduction reactions? b. Identify each oxidizing agent and reducing agent.arrow_forwardSpecify which of the following equations represent oxidation reduction reactions, and indicate the oxidizing agent, the reducing agent, the species being oxidized, and the species being reduced. a. CH4(g)+H2O(g)CO(g)+3H2(g) b. 2AgNO3(aq)+Cu(s)Cu(NO3)2(aq)+2Ag(s) c. Zn(s)+2HCl(aq)ZnCl2(aq)+H2(g) d. 2H+(aq)+2CrO42-(aq)Cr2O72-(aq)+H2O(l)arrow_forward
- An active (metal) electrode was found to gain mass as the oxidation-reduction reaction was allowed to proceed. Was the electrode part of the anode or cathode? Explain.arrow_forward. To obtain useful electrical energy from an oxidation-reduction process, we must set up the reaction in such a way that the Oxidation half-reaction and the reduction half-reaction are physically one _____another.arrow_forwardWhen jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?arrow_forward
- If a 2.5 A current is run through a circuit for 35 minutes, how many coulombs of charge moved through the circuit?arrow_forwardWhat is wrong with the following statement: The best concentration cell will consist of the substance having the most positive standard reduction potential. What drives a concentration cell to produce a large voltage?arrow_forwardIn theory, most metals should easily corrode in air. Why? A group of metals called the noble metals are relatively difficult to corrode in air. Some noble metals include gold, platinum, and silver. Reference Table 17-1 to come up with a possible reason why the noble metals are relatively difficult to corrode.arrow_forward
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