Answer: check explanation
Explanation:
Buffer solutions are solutions that have resistance towards the change in pH when H3O^+ or OH^- is added or removed. From the question, NaH2PO4 is the conjugate acid and H3Po4 is the conjugate base. Buffer solution is used for the prevention of changes due to the addition of small amounts of either strong base or strong acid.
The net ionic equations that show how NaH2PO4/H3PO4 acid/base conjugate buffer neutralizes added acid HCl and added base NaOH are written below;
H3PO4 -------------> H^+ + H2PO4^2-.
Addition of HCl;
===> H2PO4^2- + H3O^+ --------> H3PO4 + H2O.
Addition of NaOH;
====> H3PO4 + OH^- ------> H2O + H2PO4^-.
