Reference no: EM132287468

In the schematic diagram below for a galvanic cell, the half-cell on the left consists of a Zn(s) electrode in a 1.0 mol L-1 Zn(NO3)2(aq) solution. The half-cell on the right consists of a Cd(s) electrode in a 1.0 mol L-1 Cd(NO3)2(aq) solution. The electrodes are connected to a voltmeter by wires. The two solutions are connected by a salt bridge filled with a very concentrated solution of KNO3.

Half reaction E ° / VZn2+(aq) + 2 e- ?

 Zn(s) -0.763Cd2+(aq) + 2 e- ?

 Cd(s) -0.403

Answer the following questions regarding this electrochemical cell.

(a) The Cd(s) electrode is the            

• anode
• cathode

(b) The concentration of Zn2+(aq)            

• increases
• decreases

(c) The mass of the Zn(s) electrode            

• decreases
• increases

(d) Negative ions (NO3-) within the salt bridge diffuse towards the             

• Cd(NO3)2(aq)
• Zn(NO3)2(aq)

(e) What is the standard cell potential? E ° =   V 

(Enter a value accurate to 3 decimal places, e.g. 0.472, 1.624, 0.059, etc.)