Can someone tell me if these chemical reactions are correct?

Question

I have two sets of reactions for the neutralization of phosphoric and citric acid...

For phosphoric acid I have:
H3PO4(aq) + NaOH(aq) -> NaH2PO4(aq) + H2O(l)
H3PO4(aq) + 2NaOH(aq) -> Na2HPO4(aq) + 2H2O(l)
H3PO4(aq) + 3NaOH(aq) -> Na3PO4(aq) + 3H2O(l)

For citric acid I have:
H3C6H5O7(aq) + NaOH(aq) -> NaC6H7O7(aq) + H2O(l)
H3C6H5O7(aq) + 2NaOH(aq) -> Na2C6H6O7(aq) + 2H2O(l)
H3C6H5O7(aq) + 3NaOH(aq) -> Na3C6H5O7(aq) + 3H2O(l)

I'm supposed to have the 3 steps for each reaction...that's why there are 6 reactions total. So are all the steps, including the final reaction, correct?

I think each equation is supposed to represent the loss of one H+ ion..

I meant H3O+ ion...

Thanks so much Tsumego! Disregard the email I sent, I typed it up before I realized you responded to the details I added...thanks again!

Answer 1

These are the correct ones:

H3PO4(aq) + 3NaOH(aq) -> Na3PO4(aq) + 3H2O(l)

H3C6H5O7(aq) + 3NaOH(aq) -> Na3C6H5O7(aq) + 3H2O(l)

Both the PO4^3- and citrate ion can form with the loss of 3 H3O+ ions.

The above are the final reactions, but yes you are correct in stating the others because both acids are multifunctional, so you get intermediate steps before complete dissociation.

Answer 2

Yes. All three steps of each are correct. However, you might have expressed it:

H3PO4(aq) + NaOH(aq) ===> NaH2PO4(aq) + H2O(l)
NaH2PO4(aq) + NaOH(aq) ====> Na2HPO4(aq) + H2O(l)
Na2HPO4(aq) + NaOH(aq) ===> Na3PO4(aq) + H2O(l)

Similarly for citric acid.

Answer 3

phosphoric acid is a tri protic acid therefore you need 3 NaOH, citric is monoprotic only one NaOh