СoSO4 + 2NaOH = Co(OH)2 + Na2SO4
2Co(OH)2 + H2SO4 = (CoOH)2SO4 + 2H2O
(CoOH)2SO4 + 4HNO3 = 2Co(NO3)2 + H2SO4 +2 H2O
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Verified answer
СoSO4 + 2NaOH = Co(OH)2 + Na2SO4
2Co(OH)2 + H2SO4 = (CoOH)2SO4 + 2H2O
(CoOH)2SO4 + 4HNO3 = 2Co(NO3)2 + H2SO4 +2 H2O