Posted by Jared on Wednesday, July 4, 2007 at 2:30pm.
Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations:
MnO4– + C2O42– --> Mn2+ + CO2
MnO4– + Fe2+ --> Mn2+ + Fe3+ ?
is it because K+ is just a spectator ion or is it because K+ would cause a net positive charge in the products
The potassium ion is a spectator ion on both side.
And as a follow up, adding K^+ to each side in the balanced equations will NOT cause a positive charge (in excess, anyway). The positive charges will balance the negative charges on each side of the equation.
A. K+ is a spectator ion and redox reactions are written as net ionic reactions.
B. KMnO4 is not added to either reaction.
C. The equations cannot be balanced if the potassium ion K+ is present.
D. The presence of K+ would result in a net positive charge in the products.
E. None of these.
so the answer would definately be none of these then right?
A. K+ is a spectator ion and redox reactions are written as net ionic reactions.
K+ is a spectator ion and redox reactions MAY be written as net ionic reactions BUT they may also be written as molecular equations.
B. KMnO4 is not added to either reaction.
definitely not correct.
C. The equations cannot be balanced if the potassium ion K+ is present.
K+ may be added AND the equation can be balanced.
D. The presence of K+ would result in a net positive charge in the products.
definitely not correct.
E. None of these.
so the answer would definately be none of these then right?
right. I would go with E. A comes close but redox reactions can be balanced if written as an ionic equation or if written as a molecular equation.
- Chemistry - rosa, Monday, April 28, 2008 at 2:54pm
The answer is NOT none of these....I guess it was A then...
- Chemistry - UCI kid, Monday, April 28, 2008 at 5:17pm
AAAAAAAAAAAAAAaaa
- Chemistry - UCI student, Monday, April 27, 2009 at 12:34pm
the answer is A
- Chemistry - Jingwoo, Monday, April 27, 2009 at 3:38pm
I got F
- Chemistry - ashley, Sunday, April 11, 2010 at 11:06pm
its A. i just got it correct
- Chemistry - Rohan, Sunday, April 25, 2010 at 7:19pm
The answer is definitely A
- Chemistry - fred, Monday, April 26, 2010 at 7:08pm
the answer was A
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