How can you experimentally determine the pka of acetic acid?

Explanation:

The pKa value of acetic acid is determined experimentally by plotting pH titration curve.

The hydrogen ion, H+ concentration can be determined by performing a pH titration of a weak acid with a strong base like NaOH etc.

Starting from the dissociation equation for the acid,

HA(aq) + OH-(aq) --> H3O+(aq) + A−(aq)

we obtain for the point of half equivalence (where half of the acid has reacted with the base):

[A−] = [HA].

From the equilibrium equation

it therefore follows that

pKa = pH.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.