Use the data in the simulation to find the ka value of hf, hydrofluoric acid

We need to find the Ka value of HF. First, set up the balanced chemical equation:

HF ===> H+ + F-

The formula for the Ka value of an acid is

Ka = [concentration of products] / [concentration of reactants]

Ka = [H+] [F-} / [HF]

So if we are given the concentration of the products and reactants, we will be able to solve for the Ka value of HF. 

Talc (french chalk) is the ingredient