[derek0o0]

Well..it's a question about making buffers
1. H3PO4
2. NaHCO3
what salts can these two chemicals mix with to produce buffer solution?

[Astrokel]

What do you know about buffer?

[derek0o0]

What do you know about buffer?

is making up by either weak acid or base with its salt

[Astrokel]

since your question asking about salt to be added, so your 2 solutions are acting as weak acid/base, so its conjugate base/acid must be contained in the salt.

[derek0o0]

since your question asking about salt to be added, so your 2 solutions are acting as weak acid/base, so its conjugate base/acid must be contained in the salt.

i know what u mean
like CH3COOH/CH3COONa or NH3/NH4Cl
but i jus can't think any salt from H3PO4 and NaHCO3
can u give me one example

[Astrokel]

example: KH₂PO₄/K₂HPO₄
.