Will this base take the proton?

You will write three functions that decide whether an acid reacts with a base, from the pKa values.

The idea. For an acid HA and a base B$^-$, the equilibrium constant is $K = 10^{\,pK_a(\text{HB}) - pK_a(\text{HA})}$. A very large K means the reaction goes to completion. A very small K means almost nothing happens. The share of an acid present as its anion at a given pH is $\dfrac{100}{1 + 10^{\,pK_a - \text{pH}}}$ percent.

Your tasks.

1. Complete percent_anion(pka, ph) so that it returns the share of the acid present as its anion, in percent.
2. Complete equilibrium_constant(pka_acid, pka_conjugate) so that it returns K for the acid with a base whose conjugate acid has the second pKa.
3. Complete verdict(k) so that it returns "goes" when K is above 1000, "no reaction" when K is below 0.001, and "partly" otherwise.