Posted by Fred on Wednesday, October 10, 2012 at 8:18pm.
To which end point did you titrate; i.e. how many of the H^+ were neutralized. If all three then
H3PO4 + 3NaOH ==> Na3PO4 + 3H2O
mols NaOH = M x L = ?
mols H3PO4 = 1/3 that.
M H3PO4 = mols H3PO4/L H3PO4
Frankly, I doubt you neutralized all three; you will need to adjust the above if less than three.
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