Question

For an acid with 3 removable protons, for a titration with a base, how many moles of bases will be needed to reach the final equivalence point if we consider a running total?

Answer 1

answer : 3 moles of base needed

explanation:

suppose acid = H3A

base = NaOH

for first equilivalence point   : H3A + NaOH ------------------> NaH2A + H2O    (one mole base needed)

for second equilivalence point   : NaH2A + NaOH ------------------> Na2HA + H2O    (one mole base needed)

for third equilivalence point   : Na2HA + NaOH ------------------> Na3A + H2O    (one mole base needed)

total 3 moles of base needed