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Ch.18

CHEM 2

QuestionAnswer
Which of the following reactions is a redox reaction? (a) K2CrO4 + BaCl2 → BaCrO4 + 2KCl (b) Pb22+ + 2Br- → PbBr (c) Cu + S → CuS (c) only
Which substance is the oxidizing agent in the following reaction? Fe2S3 + 12HNO3 → 2Fe(NO3)3 + 3S + 6NO2 + 6H2O HNO3
The purpose of the salt bridge in an electrochemical cell is to maintain electrical neutrality in the half-cells via migration of ions. T/F True
Which element is reduced in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g) H
What is the oxidation number of bromine in the BrO3- ion? +5
Which element is oxidized in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g) Fe
Alkaline metals are most likely to be better oxidizing agent than halogens. T/F False
Zn powder is the anode in an alkaline battery. T/F True
Which substance is the reducing agent in the following reaction? Fe2S3 + 12HNO3 → 2Fe(NO3)3 + 3S + 6NO2 + 6H2O Fe2S3
Which transformation could take place at the anode of an electrochemical cell? None of the the below could take place at the anode.
Created by: aarell82
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