"Determine the volume of a 0.925M K2Cr2O7 solution required to completely react with 5.28g of Cu."
My attempted method for solving was to convert the 5.28g of Cu to moles, find moles of K2Cr2O7 using the mole to mole ratio, and then use M=mol/L to solve for volume. Here is the chemical equation I came up with...
K2Cr2O7 + 2Cu -> Cu2Cr2O7^- + 2K^+
I'm not really sure what I'm doing wrong, but I think it may have something to do with the equation I came up with above.
1 answer
My original answer didn't post. I said that you don't say but obviously the Cu (metal???) must be laced in solution and it PROBABLY formed Cu^2+ in which case the ppt will be CuCr2O7. Try that.
0 answers