pH vs pKa

[Noh_Jasmine_1J]

what is the difference between pH and pKa? how would you solve for pKa if given pH?

[Calvin Patel 2H]

pKa is the -log(Ka value). pH is the -log(H3O+ concentration). If you are given the pH, you can use 10^-(pH value) and find your H3O+ concentration. Then you can set up an ice table and find the values at equilibrium and use those values to find the Ka value and pKa value.

[Karan Thaker 2L]

If given pH, just take the inverse log of the pH and this will give you H30+ concentration. Follow steps on ice tables and determine other concentartions and you have your Ka value.

The main difference is that pKa is a logartithmic expression of Ka values and pH is a logarithmic expression of hydrogen ion conentration.

[Katie_Duong_1D]

pH is -log(H3O+ concentration). pka is -log(ka).

H3O+ concentration can be calculated by "undoing" the log. 10^-pH. From there, you can do an ICE table to find ka. ka is equilibrium concentrations for products over equilibrium concentrations for reactants.