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I learned in chem ap today that Cr at a +6 in Cr2O7 goes to just a Cr +3 after reacting in a slightly acidic solution. (ex: the equation, HSO3(-) + Cr2O7(-2) ---> SO4(-2) + Cr(+3) ). Why are there no oxygens attached to the Cr? CrO2(-) is also a Cr+3, but it's no good. There's a lot of Cr+3 oxide compounds, but why only this? Also, I want to verify, there's an H attached to the SO3 when it's in a slightly acidic solution because there's an excess amount of H+ (the definition of an acidic solution) and so it attaches itself to the SO3. I have another question (now that I think of it), why wouldn't the HSO3(-) go to a more stable H2SO3? and why aren't there any H's attached to the SO4 in the reaction? Thanks. Ben
Re: why does Cr2O7 only goes to a Cr+3 in a slightly acidic solution?
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