Question

glass electode require soaking in water for some hours before use so that​

Answer 1

Answer:

pH meters with two separate electrodes can have their glass electrodes stored in an acidic solution of roughly pH 3. In either case, never use distilled or deionized water, as prolonged submersion in water can encourage diffusion out of the electrode, which will affect its sensitivity.

Answer 2

1.To prevent the glass electrode from drying out.

2.to prevent carryover contamination of the tested solutions.

Explanation:

1.a glass electrode that responds to the hydrogen ion concentration via a half cell of silver chloride on silver wire leading to the high impedance voltmeter.

2.There is also a reference electrode which consists of saturated potassium chloride solution, which is separated from the solution under test by a porous plug.

3.The KCl solution is connected electrically to the high impedance voltmeter by a platinum wire. The voltage difference between the glass electrode and the reference electrode or “junction” is converted via electronics to pH using the Nernst equation.

4.Glass electrodes sensitive to hydrogen ions are the most commonly used sensors in chemistry and related disciplines. They belong to potentiometric membrane sensors and are constructed in various configurations depending on the application.