Calculate the acid ionization constant for dihydrogen phosphate ion
The acid ionization constant for dihydrogen phosphate ion, H2PO4-, can be calculated using the equation:
Ka = ([H+][HPO4-]) / [H2PO4-]
where [H+] is the concentration of hydrogen ions in the solution, [HPO4-] is the concentration of hydrogen phosphate ions in the solution, and [H2PO4-] is the concentration of dihydrogen phosphate ions in the solution.
The pKa value for dihydrogen phosphate ion is 7.21.
To calculate the Ka value, we can use the relationship:
Ka = 10^(-pKa)
Ka = 10^(-7.21)
Ka = 1.02 × 10^(-8)
Therefore, the acid ionization constant (Ka) for dihydrogen phosphate ion is approximately 1.02 × 10^(-8).