What pairs of chemical compounds can act as a buffer system?
There are several pairs of chemical compounds that can act as a buffer system. Some common examples include:
1. Acetic acid (CH3COOH) and sodium acetate (CH3COONa)
2. Carbonic acid (H2CO3) and sodium bicarbonate (NaHCO3)
3. Phosphoric acid (H3PO4) and sodium phosphate (Na2HPO4)
4. Citric acid (C6H8O7) and sodium citrate (C6H5Na3O7)
5. Ammonium hydroxide (NH4OH) and ammonium chloride (NH4Cl)
These pairs of compounds are able to resist changes in pH by accepting or donating hydrogen ions (H+) when acid or base is added to the solution.