BuffersBuffers

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Buffer solutions are Weak acids or bases, which when adding acids or bases, change from or to the conjugates, eliminating the strong ions, making it require a lot more additional solutes to raise/lower the pH.

NaC2H3O2? → Na+ + C2H3O2-

HC2H3O2 ↔ H+ and C2H3O2-

With excess H+, the protons are added as such, to the solution.

H+ + C2H3O2- → (miniscule ← ) HC2H3O2

Conjugates of Weak Acids and Weak Bases; i.e. { C2H3O2- and NH4+ } can absorb H+. and OH-. Respectively. This makes saline solutions that leave Conjugates very stabile at pHs because they are constantly maintained by the equilibrium of the WA and WB.