|Dissolving MnO2 with HNO3
||[Mar. 6th, 2011|11:14 pm]
I ask a lot of questions and you all are always very helpful. (: |
We recently had a lab where we used diluted HNO3 to clean a filter that we had collected MnO2 from. Why was HNO3 used when MnO2 is insoluble in nitric acid?
Someone showed me this reaction:
2MnO2 + 4HNO3 -> 2Mn(NO3)2 + 2H2O
which does not make sense to me since Mn(IV) is being reduced to Mn(II), but I don't see anything being oxidized. What am I missing here?
Thanks in advance for any help/insight.