complete and balance

Question

Co(OH)3(aq)+Na2CO3(aq)

Answer 1

Is this a problem you made up yourself or one for homework? Co(OH)3 is insoluble as is Co2(CO3)3 and I'm not all that certain that a reaction will occur. It is more likely that you would get pars of both in the equilibrium mixture. Howver, this is how you balance it,
2Co(OH)3 + 3Na2CO3 ==> Co2(CO3)3 + 6NaOH

Answer 2

thanks DrBob222 for the answer kindly teach me what does sum coefficient mean and how to get it based from this problem