Shown below are some equations that are not necessarily balanced but which conta

Question

Shown below are some equations that are not necessarily balanced but which contain all the intended major species (i.e. not necessarily all needed H^+ / OH^- / H_2O for balancing purposes). Characterize the reactions by using the following four descriptors: (1) valid redox equations as written - "redox"; (2) equation which as written appears to involve oxidation / reduction but which cannot be valid as written -"bogus redox"; (3) acid-base neutralization reaction - "acid-base"; and (4) reactions that cannot be described by any of the three foregoing - "none".

Explanation / Answer

Solution :-

a).   Cr(OH)3 ----- > Cr + CrO4^2-

here Cr is oxidized an Cr is reduced to the equation is valid redox equation

b) K+ + OH- ----- > KOH      = none

no change in the oxidation states so its not redox neither acid base so its none

c) Mg(OH)2 + H+   ------ > MG%2+ + H2O    =acid base reaction

Mg(OH)2 is base reacting with H+ acid so its acid base reaction

d) Fe2O3 + CO2 ----> Fe^2+   + CO    = not valid redox equation

because Fe is reduced and carbon is also reduced

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