Question

The minimum number of moles of solid KCl added to one liter contents of a standard silver …… silver ion electrode to convert it to standard silver …. silver chloride, electrode. [E° Ag+/Ag = 0.8V, Ksp (AgCl) = 10–10] are (The answer to the question is a single digit integer, ranging from 0 to 9) Please explain complete answer.

Answer 1

equilibrium reaction:

$CaY2- Ca2+ + T4$

[tex]Kf =

Eind = K – (0.0592/2) log.

aca2+ . aY

4-

aCaY2-

ay

4- =

aca2+

aCaY K 2-

f

.

aca2+

aCaY K 2-

f[/tex]

.

Eind = K – (0.0592/2) log.

Eind = K’ – (0.0592/2) pCa.

aca2+

Kf

.aCaY2- – (0.0592/2) log. 1

If a constant amount of CaY2-

is used in the analyte solution and in the solutions

for standardization, we may write

Where K’ = K – (0.0592/2)log Kf

.aCaY2-

Thus, the mercury electrode has become an electrode of the third kind for calcium ion.