There was a question in uworld that presented a picture of a polyprotic acid titration curve. It showed the titration of H3PO4 by NaOH. According to this curve:
At the first equivalence point: [H2PO4 -] = [OH-]
At the second equivalence point: [HPO4 2-] = 1/2 [OH-]
At the third equivalence point: [PO4 3-] = 1/3[OH-]
I'm having trouble understand how they came up with these ratios. I know that, at the half equivalence point, the concentration of an acidic species in solution is = the...
Confusion about titration of polyprotic acids
At the first equivalence point: [H2PO4 -] = [OH-]
At the second equivalence point: [HPO4 2-] = 1/2 [OH-]
At the third equivalence point: [PO4 3-] = 1/3[OH-]
I'm having trouble understand how they came up with these ratios. I know that, at the half equivalence point, the concentration of an acidic species in solution is = the...
Confusion about titration of polyprotic acids