From the colligative properties of solution, which one is the best method for the determination of molecular weight of proteins and polymers?

Equivalent conductances of Ba²⁺ and Cl^$$-$$ ions are 127 and 76 ohm^$$-$$1 cm^$$-$$1 eq^$$-$$1 respectively. Equivalent conductance of BaCl₂ at infinite dilution is

For the disproportionation of copper
2Cu⁺  $$ \to $$ Cu²⁺ + Cu, E^o is
(Given E^o for Cu²⁺/Cu is 0.34 V and
E^o for Cu²⁺/Cu⁺ is 0.15 V.)

How enzymes increases the rate of reactions