Multiple choice

The carbon dioxide measuring electrode is

  1. the saturated calomel electrode

  2. the severinghaus electrode

  3. a silver chloride electrode

  4. the standard hydrogen electrode
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Severinghaus electrode is an electrode that measures carbon dioxide (CO2). It utilizes a CO2-sensitive glass electrode in a surrounding film of bicarbonate solution covered by a thin plastic carbon dioxide permeable membrane, but impermeable to water and electrolytic solutes. The carbon dioxide pressure of a sample gas or liquid equilibrates through the membrane and the glass electrode measures the resulting pH of the bicarbonate solution.

Keep practicing — related questions