What is acid and base used in Na3PO4

Your question makes no sense. Do you mean which acid and base are used to make Na3PO4? If so

NaOH + H3PO4 ==> Na3PO4 + H2O
The balanced equation is
3NaOH + H3PO4 ==> Na3PO4 + 3H2O

To understand the acid and base used in Na3PO4, let's break it down step by step:

1. Identify the compound: Na3PO4. This compound consists of sodium ions (Na+) and phosphate ions (PO4^-3).

2. Determine the acid and base: In this case, Na3PO4 is a salt, which means it does not contain any acid or base in its pure form. However, we can analyze the individual ions to understand their acidic or basic properties.

- Sodium ions (Na+): Sodium ions are derived from the strong base sodium hydroxide (NaOH), which is a strong base. However, in Na3PO4, sodium ions do not act as an acid or base.

- Phosphate ions (PO4^-3): Phosphate ions can act as both an acid and a base, depending on the reaction. In the context of Na3PO4, phosphate ions do not act as an acid or base.

So, the compound Na3PO4 does not contain any acid or base. It is a sodium salt of phosphate ions.