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Electrode Composition in pH Meters

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Questions and Answers

What is the composition of the positive electrode in a pH meter?

Ag/AgCl
Hg/HgCl (correct)
Cu/CuCl
Pt/PtCl

What solution fills the negative electrode of the pH meter?

0.01N NaOH solution
0.1N HCl solution (correct)
Saturated KCl solution
Distilled water

What is the function of the potential difference in a pH meter?

To indicate the temperature of the electrodes
To convert pH readings into electrical signals
To determine the concentration of H+ ions in the solution (correct)
To measure the temperature of the solution

Which electrode in a pH meter is considered the reference electrode?

<p>Calomel Electrode (A)</p> Signup and view all the answers

How does the H+ ion concentration affect the pH meter's readings?

<p>It determines the value of the potential difference (D)</p> Signup and view all the answers

Flashcards

pH Meter Electrode Types

A pH meter uses two electrodes: a positive (reference) and a negative (glass).

Calomel Electrode

The positive electrode, made of Hg/HgCl, and filled with a saturated KCl solution.

Glass Electrode

The negative electrode, made of Ag/AgCl and filled with 0.1N HCl solution.

Potential Difference in pH Meter

The difference in charge between the electrodes depends on the H+ ion concentration in the solution.

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Constant Electrode H+ Concentration

The H+ concentration inside the glass electrode remains stable, regardless of the solution.