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Chapter 19: Q.9E (page 1092)

Why is the formation of slag useful during the smelting of iron?

Short Answer

Expert verified

Slag protects iron from oxidation.

Step by step solution

01

Oxidation of iron:

When iron is in contact with water and oxygen, it rusts. If salt is present, for example in seawater or salt spray, the iron tends to rust more quickly, as a result of chemical reactions. Iron metal is relatively unaffected by pure water or by dry oxygen.

02

Formation of slag:

The formation of slag is useful during the smelting of iron because the \(CaSi{O_3}\)slag is less dense than the molten iron, which means it can easily be separated. The less dense slag floats on iron and protects it from oxidation. Because if iron is exposed to oxygen it can easily oxidize to \(F{e_2}{O_3}\).

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Most popular questions from this chapter

Specify whether the following complexes have isomers.

\(\begin{aligned}{}(a)tetrahedral\left( {Ni{{(CO)}_2}{{(Cl)}_2}} \right)\\(b)trigonalbipyramidal\left( {Mn{{(CO)}_4}NO} \right)\\(c)\left( {Pt{{(en)}_2}C{l_2}} \right)C{l_2}\end{aligned}\)

Name each of the compounds or ions given in \(Exercise 19.28,\)including the oxidation state of the metal.

The following reactions all occur in a blast furnace. Which of these are redox reactions?

\(\begin{aligned}{l}(a)3F{e_2}{O_3}(s) + CO(g) \to 2F{e_3}{O_4}(s) + C{O_2}(g)\\(b)F{e_3}{O_4}(s) + CO(g) \to 3FeO(s) + C{O_2}(g)\\(c)FeO(s) + CO(g) \to Fe(l) + C{O_2}(g)\\(d)C(s) + {O_2}(g) \to C{O_2}(g)\\(e)C(s) + C{O_2}(g) \to 2CO(g)\\(f)CaC{O_3}(s) + CaO(s) \to C{O_2}(g)\\(g)CaO(s) + Si{O_2}(s) \to CaSi{O_3}(l)\end{aligned}\)

Predict the products of each of the following reactions and then balance the chemical equations.

(a) Fe is heated in an atmosphere of steam.

(b) NaOH is added to a solution of Fe(NO3)3.

(c) FeSO4 is added to an acidic solution of KMnO4.

(d) Fe is added to a dilute solution of H2SO4.

(e) A solution of Fe(NO3)2 and HNO3 is allowed to stand in air.

(f) FeCO3 is added to a solution of HClO4.

(g) Fe is heated in air.

Is it possible for a complex of a metal in the transition series to have six unpaired electrons? Explain.
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