lecture 11-1 redox and galvanic cells.notebook · pdf filelecture 111 redox and galvanic...
TRANSCRIPT
Lecture 111 Redox and Galvanic Cells.notebook
1
July 30, 2012
Lecture 111 Redox and Galvanic Cells.notebook
2
July 30, 2012
Apr 311:38 AM
1 Which of the following statements about the reaction above is not true?
A The oxidation number of chromium changes from +6 to +3.
B The oxidation number of iodine changes from 1 to 0.
C The oxidation number of hydrogen changes from +1 to 0.
D The oxidation number of oxygen remains the same.
E The reaction takes place in acidic solution.
Cr2O72 + 6 I + 14 H+ 2 Cr3+ + 3 I2 + 7 H2O
Apr 311:46 AM
2 When the halfreaction above is balanced, what is the coefficient for OH if all of the coefficients are readuced to the lowest whole number?
A 1
B 2
C 3
D 4
E 5
___ CN + ____ OH ____ CNO + ____ H2O + ____ e
Apr 311:49 AM
3 The oxidationreduction reaction above is to be balanced with lowest whole number coefficients. What is the coefficient for OH?
A 1
B 2
C 3
D 4
E 5
MnO4 + I + H2O MnO2 + IO3 + OH
Lecture 111 Redox and Galvanic Cells.notebook
3
July 30, 2012