Chapter 4 - Reactions in Aqueous Solution

Oxidation of Metals by Acids and SaltsA + BX → AX + BZn ( s)+ 2HBr ( aq)→ ZnBr 2 ( aq) + H 2( g)Mn ( s)+ Pb( NO 3 ) 2( aq→ Mn NO )( 3 ) 2( aq+ Pb ) ( s)These reactions are called displacement reactions because the ion in solution is displace orreplaced through oxidation of an element.Whenever one substance is oxidized, some other substance must be reduced.Hydrogen Displacement2Na(s) + 2H 2 O(l) → 2NaOH(aq) + H 2 (g)Zn(s) + 2HCl(aq) → ZnCl 2 (aq) + H 2 (g)Halogen DisplacementF 2 >Cl 2 > Br 2 > I 2Cl 2 (g) + 2KBr(aq) → 2KCl(aq) + Br 2 (l)Cl 2 (g) + 2KF(aq) → no reactionCh 4 Reactions in Aqueous Solution - 11 -