You make a galvanic cell with standard hydrogen electrode and Cd^2+/Cd electrode.
H+/H2 (E= 0V) and Cd^2+/Cd (E=-0.40V)
a) What is the cell potential
b) Which electrode is the cathode
c) How would each of the following changes affect the cell potential (increase/decrease/no effect)
i. add a solid base NaOH to the hydrogen electrode
ii. increase partial pressure of hydrogen gas
iii. drease the concentration of Cd2+ ions

Question

You make a galvanic cell with standard hydrogen electrode and Cd^2+/Cd electrode. 
H+/H2 (E= 0V) and Cd^2+/Cd (E=-0.40V)
a) What is the cell potential
b) Which electrode is the cathode
c) How would each of the following changes affect the cell potential (increase/decrease/no effect)
       i. add a solid base NaOH to the hydrogen electrode
       ii. increase partial pressure of hydrogen gas
       iii. drease the concentration of Cd2+ ions