Question

the potential of hydrogen electrode is -118 mV. The H+ concentration
concentration of the solution is
1) 0.01M
2) 2M
3) 10-4M
4) IM
​

Answer 1

Answer:

0.01 M

Explanation:

By the formula :

E = E°−(0.059/n)log(Q)

where n = 1

E = -0.118 V

We need to find the concentration of H+ which is Q

Assuming the system in equilibrium ..

0.118 = 0.059 * log Q

log Q = -2

Q  = 10 to power -2  = 0.01 M