Concept explainers
(a)
Interpretation:
In an
Concept introduction:
In an
Electrolysis is the process in which a non-spontaneous reaction is driven by the application of electric energy.
The half-cell reaction with the lowest reduction potential reduces 1st in electrolysis process.
(b)
Interpretation:
The mass percent of the silver in product should be calculated.
Concept introduction:
1 mole of electron = 96485 C
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General Chemistry: Principles and Modern Applications (11th Edition)
- Consider three metals, X, Y, and Z, and their salts, XA, YA, and ZA. Three experiments take place with the following results: • X+hotH2Obubbles • X+YAnoreaction • X+ZAXdiscolored+Z Rank metals X, Y, and Z, in order of decreasing strength as reducing agents.arrow_forwardFor each of the following balanced half-reactions, determine whether an oxidation or reduction is occurring. (a) Cl+3eCl2 (b) Mn2+MnO2 (c) H2H+ (d) NO3NOarrow_forwardComplete and balance each of the following half-reactions (steps 25 in half-reaction method): (a) Cr2+(aq)Cr3+(aq) (b) Hg(l)+Br(aq)HgBr42(aq) (c) ZnS(s)Zn(s)+S2(aq) (d) H2(g)H2O(l) (in basic solution) (e) H2(g)H3O+(aq) (in acidic solution) (f) NO3(aq)HNO2(aq) (in acidic solution) (g) MnO2(s)MnO4(aq) (in basic solution) (h) Cl(aq)ClO3(aq) (in acidic solution)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_forward. For each of the following unbalanced oxidation-reduction chemical equations, balance the equation by inspection, and identify which species is the reducing agent. a.Fe(s)+O2(g)Fe2O3(s)b.Al(s)+Cl2(g)AlCl3(s)c.Mg(s)+P4(s)Mg3P2(s)arrow_forwardThe 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_forward
- A solution contains both iron(II) and iron(III) ions. A sample Of the solution is titrated with 35.0 ml, of M KMnO4, which oxidizes Fe2+ to Fe3+. The permanganate ion is reduced to manganese(ll) ion. The equation for this reaction is MnO4(aq)+8 H+(aq)+5Fe2+(aq)Mn2+(aq)+5Fe3+ +4H2OAnother 50.00-mL sample of the solution is treated with zinc, which reduces all the Fe3+ to Fe2+. The equation for this reaction is 2Fe3+(aq)+Zn(s)2Fe2+(aq)+Zn2+(aq)The resulting solution is again titrated with 0.0280 M KMnO4; this time 48.0 ml, is required. What are the concentrations of Fe2+ and Fe3+ in the solution?arrow_forwardWhich of the following compounds have the same oxidation level, and which have different levels?arrow_forwardAtomic 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_forward
- Consider a salt bridge cell in which the anode is a manganese rod immersed in an aqueous solution of manganese(II) sulfate. The cathode is a chromium strip immersed in an aqueous solution of chromium(III) sulfate. Sketch a diagram of the cell, indicating the flow of the current throughout. Write the half-equations for the electrode reactions, the overall equation, and the abbreviated notation for the cell.arrow_forwardAn 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_forwardConsider the following half-reactions: Explain why platinum metal will dissolve in aqua regia (a mixture of hydrochloric and nitric acids) but not in either concentrated nitric or concentrated hydrochloric acid individually.arrow_forward
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