Question

In a galvanic cell,a oxidation occurs at the (name of electrode)b.the cathode is the (sign) electrodec.cations flow in solution toward the (name of electrode)d.electrons flow from the (name of electrode) to (name of electrode)

Answer 1

Answer: a) anode

b) positive

c) cathode

d) anode to cathode

Explanation:

Galvanic cell is defined as a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy.

In the galvanic cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.  Thus the electrons are produced at anode and travel towards cathode.

Due to loss of electrons at anode, positive charge in concentrated in anode and negative charge is concentrated in cathode. To balance these charges , positive ions or cations from salt bridge move towards cathode and negative ions or anions from salt bridge move towards anode.

The balanced two-half reactions will be:

Oxidation half reaction : $M(s)\rightarrow M^{n+}(aq)+ne^-$

Reduction half reaction : $X^{n+}(aq)+ne^-\rightarrow X(s)$

Thus the overall reaction will be,

$M(s)+X^{n+}(aq)\rightarrow M^{n+}(aq)+X(s)$