Kohlrausch's law in code

You will use a table of ion values. One function adds the ions of a salt. Another finds the limiting value of a weak acid from three strong electrolytes. The last two find the degree of dissociation and the acid constant.

The idea. $\Lambda_m^\circ = \nu_+\lambda^\circ_+ + \nu_-\lambda^\circ_-$. For a weak acid HA, $\Lambda_m^\circ(\text{HA}) = \Lambda_m^\circ(\text{HCl}) + \Lambda_m^\circ(\text{NaA}) - \Lambda_m^\circ(\text{NaCl})$. Then $\alpha = \dfrac{\Lambda_m}{\Lambda_m^\circ}$ and $K_a = \dfrac{c\alpha^2}{1 - \alpha}$.

Your tasks.

1. Complete lam0(cation, anion, n_cation, n_anion) so that it adds the ions, using the table.
2. Complete weak_acid_lam0(hcl, salt, nacl) so that it returns the limiting value of the acid.
3. Complete alpha(lam, lam0_value) so that it returns the degree of dissociation.
4. Complete ka(c, a) so that it returns $K_a$ with the full formula.