Problem: Which of the following reactions are redox reactions?Check all that apply. a) Al(s)+3Ag+(aq) = Al3+(aq)+3Ag(s)b) SO3(g)+H2O(l) = H2SO4(aq)c) Ba(s)+Cl2(g) = BaCl2(s)d) Mg(s)+Br2(l) = MgBr2(s)

FREE Expert Solution

a) Al(s)+3Ag+(aq) = Al3+(aq)+ 3Ag(s)

Al (s): O.S. = 0

Al3+ (aq): O.S. = +3

Al  change in O.S. : 0 to +3  reduction


Ag+ (aq): O.S. = +1

Ag (s): O.S. = 0

Ag  change in O.S. : +1 to 0 oxidation 

redox reaction


b) SO3(g)+H2O(l) = H2SO4(aq)


O.S. S + 3(O.S. O) = 0

O.S. S + 3(-2) = 0

O.S. S + (-6) = 0

O.S. S = +6


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Problem Details

Which of the following reactions are redox reactions?

Check all that apply. 

a) Al(s)+3Ag+(aq) = Al3+(aq)+3Ag(s)

b) SO3(g)+H2O(l) = H2SO4(aq)

c) Ba(s)+Cl2(g) = BaCl2(s)

d) Mg(s)+Br2(l) = MgBr2(s)

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