Carbon monoxide detectors are in widespread use in the workplace and home. MetaJ oxide (e.g. SnO2) semiconductor and electrochemical sensors are commonly used,
(a) Explain how an SnO2 sensor for CO works,
(b) An electrochemical sensor employs platinum electrodes with aqueous sulfuric acid as the electrolyte. CO is oxidized at the anode. Write half equations for the anode and cathode reactions. Outline how the cell works as a quantitative sensor for CO.
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