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absorption acid activity added addition Akad alcohol alkali alloys amount analysis appears aqueous atoms bond calculated Chem chemical Chemistry chloride cobalt complex components composition compounds concentration conductivity constant containing corresponding crystallisation crystals curves decomposition density determined diagram dissolved effect electron energy equation equilibrium eutectic experimental experiments formation formed given gives H₂O heating hydrogen hydroxide increase indicates ionic ions isotherm Khim lead lines liquid maximum measured melting metal method mixed mixture mole molecules NaOH Nauk SSSR Neorg niobium observed obtained oxide oxygen platinum possible potassium precipitate prepared present properties pure quantity range ratio reaction reduced salt saturated separated shown shows similar sodium solid phase solid solutions solubility solution solvent stable structure studied Table temperature tion titration values weight X-ray Zhur