Problem

Quinone can be reduced to hydroquinone with an excess of electrolytically generated Sn(II)...

Quinone can be reduced to hydroquinone with an excess of electrolytically generated Sn(II):

The polarity of the working electrode is then reversed, and the excess Sn(II) is oxidized with Br2 generated in a coulometric titration:

Appropriate quantities of SnCl4 and KBr were added to a 50.0-mL sample. Calculate the mass of C6H4O2 in the sample from the data:

Working Electrode

Functioning As

Generation Time with Constant

Current of 1.06 mA, min

Anode

8.34

Cathode

0.691

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Solutions For Problems in Chapter 22

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