glass electrode
Quick Summary
A glass electrode is a type of electrode used in measuring the pH of a solution. It typically consists of a glass tube sealed at the bottom with a thin glass bulb. Inside this bulb is a solution of constant pH, often a chloride buffer, along with a silver-silver chloride reference electrode.1
When immersed in an unknown solution alongside another reference electrode, such as a calomel electrode, the glass electrode helps determine the solution's pH. The glass electrode develops an electric potential directly related to the hydrogen-ion activity in the solution. This potential difference, measured by a voltmeter connected to the glass and reference electrodes, indicates the solution's acidity or alkalinity.12
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