The equation described by the kb value is 5.21 x [tex]10^-^3[/tex].
The potential of Hydrogen is what pH is formally known as. The negative logarithm of the concentration of H+ ions is known as pH. Thus, the definition of pH as the amount of hydrogen is provided. The hydrogen ion concentration in a solution is described by the pH scale, which also serves as a gauge for the solution's acidity or basicity.
Assuming PO₄³⁻ (the phosphate anion).
PO₄³- + H₂O ==> HPO₄²⁻ + OH⁻
Kb = [HPO₄²⁻][OH⁻] / [PO₄³⁻]
We can find the [OH⁻] from the pH of 12.70.
pH + pOH = 14
14.0 - 12.7 = 1.3 = pOH
[OH] = 1x[tex]10^-^1^.^3[/tex]
[OH-] = 5.0x[tex]10^-^2[/tex] M
[HPO₄²⁻] = 5.0x[tex]10^-^2[/tex] M
Kb = (5.0x[tex]10^-^2[/tex])2 / 0.48
= 2.5x[tex]10^-^3[/tex] / 0.48
Kb = 5.21 x [tex]10^-^3[/tex]
Learn more about pH here:
https://brainly.com/question/8758541
#SPJ4
