A PH Meter Uses an Electrode Arrangement That Provides a Voltage

question 139

Multiple Choice

A pH meter uses an electrode arrangement that provides a voltage that depends on [H⁺], in accord with the Nernst equation. The following plot illustrates this dependence. What effect would changing temperature have on the measurement and this plot?

• A) A change of temperature would have no effect.
• B) An increase in temperature would increase the slope.
• C) An increase in temperature would decrease the slope.
• D) An increase in temperature would increase the y intercept.
• E) An increase in temperature would decrease the y intercept.

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