standard cell potential question?

Question

The cathode and anode reactions in a certain electrochemical reaction are shown below:

Cathode: H₂O_(l) + 2e → H_2(g) + 2OH^-_(aq)    

Anode: 2Cl^-_(aq) → Cl_2(g) + 2e

The standard cell potential of this cell is?  a.bc V. 

State whether the cell voltaic or electrolytic?

Answer 1

Look up standard reduction potentials for each reaction, and the subtract the cathode value from the anode value. If the result is positive, it is a voltaic cell. If negative, it would be electrolytic. I believe in the example given, the cell will be voltaic with a standard cell potential of approximately 0.5 V