Consider the following spontaneous reactions that occur in the forward direction
ID: 525854 • Letter: C
Question
Consider the following spontaneous reactions that occur in the forward directions at 25C standard conditions:
2 Ag(s) + Pd2+(aq) ---> 2 Ag+(aq) + pd(s)
Ga(s) + 3Ag+(aq) ---> Ga3+(aq) + 3Ag(s)
Sc(s) + Ga3+(aq) ---> Sc3+(aq) + Ga(s)
From the above information, predict whether the following reactions will be spontaneous in the forward direction at 25C under standard conditions.
A)3Pd(s) + 2Ga3+(aq)---> 3Pd2+(qq) + 2Ga(s)
B)2Sc(s) + 2Pd2+(aq) ---> 2 Sc3+(aq) + 2 Pd(s)
C) Sc3+(aq) + 3 Ag(s) ---> Sc(s) + 3 Ag+(aq)
d) Reactions a and c are spontaneous in the forward direction.
e) Reactions a, b and c are spontaneous in the forward direction.
f) None of the above
Please show work
Explanation / Answer
According to the reaction the elements in increasing reduction potential will be
Sc3+ < Ga3+ < Ag+ < Pd2+
the answer is B 2Sc(s) + 2Pd2+(aq) ---> 2 Sc3+(aq) + 2 Pd(s) will be the only spontaeous reaction