The cellhas a potential of 0.2106 V when the solution in the right-hand compartment is a b...

The cell

has a potential of 0.2106 V when the solution in the right-hand compartment is a buffer of Ph 4.006. The following potentials are obtained when the buffer is replaced with unknowns:

(a) 20.2902 V and

(b) 10.1241 V. Calculate the pH and the hydrogenion activity of each unknown.

(c) Assuming an uncertainty of 0.002 V in the junction potential, what is the range of hydrogen ion activities within which the true value might be expected to lie?