Question

Enter electrons as e^-.

Use smallest possible integer coefficients for ALL reactions.

If a box is not needed, leave it blank.

A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge.

Pb²⁺(aq) + 2Cr²⁺(aq) ----->Pb(s) + 2Cr³⁺(aq)

The anode reaction is:

_____(aq)(s)(l)(g)

+

_____(aq)(s)(l)(g)

--->

_____(aq)(s)(l)(g)

+

_____(aq)(s)(l)(g)

The cathode reaction is:

_____(aq)(s)(l)(g)

+

_____(aq)(s)(l)(g)

----->

____(aq)(s)(l)(g)

+

____(aq)(s)(l)(g)

In the external circuit, electrons migrate _____ (from, to) the Pb|Pb²⁺ electrode _____ (from, to) the Cr²⁺|Cr³⁺ electrode.

In the salt bridge, anions migrate _____ (from, to) the Pb|Pb²⁺ compartment _____ (from, to) the Cr²⁺|Cr³⁺ compartment.

Answer 1

A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge.
Pb2+(aq) + 2Cr2+(aq) ----->Pb(s) + 2Cr3+(aq)

The anode reaction is:

Cr2+(aq) ------------> Cr3+(aq) + e-

The cathode reaction is:

Pb2+(aq) + 2 e- ----->   Pb(s)

In the external circuit, electrons migrate to the Pb|Pb2+ electrode from the Cr2+|Cr3+ electrode.

In the salt bridge, anions migrate from the Pb|Pb2+ compartment to the Cr2+|Cr3+ compartment.