Question: Standard addition. A particular CO2 compound electrode like the one in Figure 14-28 obeys the equation E = constant - [RT (ln 10)/2F] log[CO2], where

Standard addition. A particular CO2 compound electrode like the one in Figure 14-28 obeys the equation E = constant - [βRT (ln 10)/2F] log[CO2], where R is the gas constant, T is temperature (303.15 K), F is the Faraday constant, and β = 0.933 (measured from a calibration curve). [CO2] represents all forms of dissolved carbon dioxide at the pH of the experiment, which was 5.0. Standard additions of volume VS containing a standard concentration cS = 0.020 0 M NaHCO3 were made to an unknown solution whose initial volume was V0 = 55.0 mL.

Prepare a graph with Equation 14-15 and find [CO2] in the unknown.

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The function to plot on the yaxis is V O V s 10 ES where S RT In ... View full answer

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