- K3PO4 and K2HPO4: These two substances can act as a buffer system as they both contain phosphate ions in different protonation states (H3PO4 and H2PO4-). A buffer system can be formed using a mixture of weak acid and its conjugate base.
- NaHCO3 and K2CO3: These two substances can also act as a buffer system as they both contain carbonate ions in different protonation states (HCO3- and CO3^2-). A buffer system can be formed using a mixture of weak acid and its conjugate base.
- NH3 alone: NH3 on its own cannot act as a buffer because it is a weak base, not a weak acid or its conjugate base.
- NH4Cl and NH3: This combination can act as a buffer system as NH4+ in NH4Cl can act as a weak acid and NH3 can act as its conjugate base.
Therefore, the solutions containing K3PO4 and K2HPO4, NaHCO3 and K2CO3, and NH4Cl and NH3 are buffers.
Determine which of the solutions containing each of the following substances is a buffer. Check all that apply.
K3PO4 and K2HPO4
NaHCO3 and K2CO3
NH3 alone
NH4Cl and NH3
None of the above
X
1 answer