Question

The voltage $\left(E_0\right)$ developed across a glass electrode for pH measurement is related to the temperature (T) by the relation

• A. $E_0\propto \frac{1}{T^2}$
• B. $E_0\propto \frac{1}{T}$
• C. $E_0\propto T$
• D. $E_0\propto T^2$

Answer 1

The correct option is C $E_0\propto T$

Voltage $E_O$ developed across the glass electrode for pH measurement is directly proportional to the temperature (T).

$E_0\propto T$

For pH measurement, nearest equation is given by

$E_0=-\frac{RT}{nf}ln\frac{C_0}{C_i}$