77. Solving a chemistry problem

8. The pH of the solution is measured by the potentiometric method using a glass electrode with a hydrogen function and a silver chloride reference electrode. Calculate the pH of the solution using the data given in the table, which shows the values ​​of the electromotive force of a given galvanic cell (E) and the values ​​of the constants (φ/) of glass electrodes. The potential of the silver chloride electrode is 0.222 V at 25°C.

Task: E 0.50 V; φ 0.12 V

When solving the task, it must be remembered that the glass electrode constant is used instead of the standard glass electrode potential, which cannot be reduced due to the wide variety of glasses from which such electrodes are made. In addition, it is necessary to check the possibility of another solution to this problem.