Cobalt hydroxide precipitate. Cobalt hydroxide (Co(OH)2) is formed by adding sodium hydroxide (NaOH, clear) to a solution containing cobalt ions, in t

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Cobalt hydroxide precipitate. Cobalt hydroxide (Co(OH)2) is formed by adding sodium hydroxide (NaOH, clear) to a solution containing cobalt ions, in this case cobalt chloride solution (, pink). This reaction produces sodium chloride (NaCl) solution and cobalt hydroxide, which is precipitated out of solution as a dark blue solid. Addition of sodium hydroxide is used as a test for positive metal ions in solution, in this case hydrated transition metal ions.

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Keywords: 2, blue, chemical, chemicals, chemistry, cobalt, education, equipment, experiment, hydroxide, ion, laboratory, metal, nacl, precipitate, precipitating, reacting, school, science, sodium, solid, test, transition, tube