Question

Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (3.2x10-3), complete the reaction table for vinegar. Then calculate the acidity constant.
Reaction table is given
Ch3COOH + H2O --CH3COO- + H3O+
Initial.
Change
equilibrium

Answer 1

Initial concentration of acetic acid is .8326M. The other 2 substances involves, C2H2O2- and H+ or H3O+, will be 0 initially. Since they give you equilibrium concentration of H+, you can just subtract that from the initial acetic acid concentration to find the final. [H3O+]=[C2H3O2-] at any given moment. Too azy to exolain change, and its simple. Once you have all equilibrium concentrations, plug them into equilibrium constant equation to find Ka.