Aluminum is plated out according to the half- reaction below. What mass of alumi

Question

Aluminum is plated out according to the half- reaction below. What mass of aluminum can be plated object if a current of 5.0 A is passed through an electrolytic cell for 45 minutes? Al3+(aq) + 3 e- rightarrow Al(s) In an electrochemical cell, Q = 2.2 times 103 and K = 7.1 times 101. Based on this information, which of the following statements is TRUE? Ecell is positive and Eocell is negative Ecell is negative and Eocell is positive Both Ecell and Eocell are positive Both Ecell and Eocell are negative None of these is TRUE What substance is being reduced in the following reaction? 3Cu(s) + 2 MnO4-(aq) + 8 H+(aq) rightarrow 3 Cu2+ (aq) + 2 MnO2(s) + 4 H2O(I)

Explanation / Answer

Solution :-

Given Q= 2.2*10^3

K= 7.1*10^1

When Q<K then reaction is spontaneous and favors more product formation that is shifts to right side.

When Q>K then reaction is non spontaneous and shift to the reactant side.

And when Q=K then no reaction happens.

So for the given question Q value is larger than K therefore reaction is non spontaneous and therefore Eo cell is less than zero means Eo cell is negative

Therefore E cell is also negative.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.