The weak ionization constant (Ka) for HN3 is equal to:
А
B
[H3O+][N3]
[HN3]
[H3O+][N3]
[HN3] [H20]

Ka = [H3O+] [N3-] /[HN3]

Explanation:

We'll begin by writing the ionization equation for HN3. This is illustrated below:

When HN3 ionizes in water, the following are obtained:

HN3 + H2O <==> H3O+ + N3-

The ionization constant, Ka is simply the ratio of the concentration of the products to that of the reactants.

Thus, the ionization constant, Ka for HN3 it written as follow:

Ka = [H3O+] [N3-] /[HN3]

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

the answer is na (sodium)