Explain how a glass pH combination electrode, shown below, operates by placing t

Question

Explain how a glass pH combination electrode, shown below, operates by placing the following statements in order beginning after the electrode is placed in the aqueous sample solution. The potential difference is measured across the membrane by the two reference electrodes. The potential difference is converted to a pH value. The surface of the thin glass membrane swells as it absorbs water. H^+ diffuses into the glass in place of the metal ions. Metal ions in the hydrated gel region diffuse out of the glass into solution.

Explanation / Answer

When silver electrode is dipped in silver chloride solution

1.the surface of thin glass membrane swells as it absorb water.

2.metal ions in hydrated gel region diffuse out of the glass into the solution.

3.H+iondiffuesee into the glass in place of metal ions.

4.the potential difference is measured across the membrane by two reference eletrodes.

5.the potential difference is converted to pH value

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