Use the Activity Series (Silberberg) to predict whether each of the following reactions will occur spontaneously...

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Chemistry

Use the Activity Series (Silberberg) to predict whether each ofthe following reactions will occur spontaneously (yes or no):
a) Mn²⁺ (aq) + Co (s) --> Mn (s) + Co²⁺(aq)
b) 3 Zn (s) + 2 Cr³⁺ (aq) --> 3 Zn²⁺ (aq)+ 2 Cr (s)
c) Ba²⁺ (aq) +2 Li (s) --> Ba (s) + 2 Li⁺(aq)
d) Hg²⁺ (aq) + Cd (s) --> Hg (l) + Cd²⁺(aq)
e) Ca (s) + 2 K⁺ (aq) --> Ca²⁺ (aq) + 2 K(s)
f) Ni²⁺ (aq) + Mg (s) --> Ni (s) + Mg²⁺(aq)
For each of these reactions, calculate the overall cell voltage,(using Append D Silberberg) and compare this quantitativeprediction with the qualitative Activity Series predictions(spontaneous or not) listed above.

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3.9 Ratings (395 Votes)

a Mn2 aq Co s Mn s Co2 aq From the activity series Mn lies above Co which means Mn is more reactive than Co and should undergo oxidation So this reaction is not spontaneous Oxidation Co s Co2 aq Eo 028 V ReductionMn2 aq Mn s Eo 118 V Eocell 028 118 09 V Since cell potential is negative it is not a spontaneous reaction b 3 Zn s 2 Cr3 aq 3 Zn2 aq 2 Cr s From the activity series Zn lies above Cr See Answer

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