Suggest a way to determine the $\Lambda _m^o$ value of water.

(N/A) Applying Kohlrausch's law of independent migration of ions,the $\Lambda _{m}^{o}$ value of water can be determined as follows:
$\Lambda _{m(H_2O)}^o = \lambda _{H^{+}}^o + \lambda _{OH^{-}}^o$
$= (\lambda _{H^{+}}^o + \lambda _{Cl^{-}}^o) + (\lambda _{Na^{+}}^o + \lambda _{OH^{-}}^o) - (\lambda _{Na^{+}}^o + \lambda _{Cl^{-}}^o)$
$= \Lambda _{m(HCl)}^o + \Lambda _{m(NaOH)}^o - \Lambda _{m(NaCl)}^o$
Hence,by knowing the values of $\Lambda _m^o$ for $HCl, NaOH,$ and $NaCl$,the $\Lambda _m^o$ value of water can be determined.