(ii) Explain one reason for using aluminium in making electrical cables and drink cans respectively. Aircraft bodies.. Drink cans... (f) Sulfur trioxide reacts with water to form sulfuric acid. Sulfuric acid reacts with metals to form a solution of sulfate salt, for example zinc forming zinc sulfate solution. Explain why a piece of lead stops reacting soon after being added to sulfuric acid even though it can react with sulfuric acid.

(ii) Explain one reason for using aluminium in making electrical cables and drink cans respectively. Aircraft bodies.. Drink cans... (f) Sulfur trioxide reacts with water to form sulfuric acid. Sulfuric acid reacts with metals to form a solution of sulfate salt, for example zinc forming zinc sulfate solution. Explain why a piece of lead stops reacting soon after being added to sulfuric acid even though it can react with sulfuric acid.

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter4: Reactions In Aqueous Solution

Section: Chapter Questions

Problem 74QAP: A solution contains both iron(II) and iron(III) ions. A sample Of the solution is titrated with 35.0...

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Consider the following balanced redox reaction in basic medium. 3Sn2+(aq)+Cr2O72(aq)+4H2O3Sn4+(aq)+Cr2O3(s)+8OH(aq) (a) What is the oxidizing agent? (b) What species has the element that increases its oxidation number? (c) What species contains the element with the highest oxidation number? (d) If the reaction were to take place in acidic medium, what species would not be included in the reaction?
In some old European churches, the stained-glass windowshave so darkened from corrosion and age that hardly anylight comes through. Microprobe analysis showed that tinycracks anddefects on the glass surface were enriched ininsoluble Mn(III) and Mn(IV) compounds. From AppendixE, suggest a reducing agent and conditions that might successfullyconvert thesecompounds to soluble Mn(II) withoutsimultaneously reducing Fe(III) (which gives the glassits colors) to Fe(II). Take MnO2 as representative of theinsoluble Mn(III) and Mn(IV) compounds.
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?
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?
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