Molecular equation: CoSO4 + 2NaOH → Co(OH)2↓ + Na2SO4
Total ionic equation: Co2+ + SO4^2- + 2Na+ + 2OH^- → Co(OH)2↓ + 2Na+ + SO4^2-
Net ionic equation: Co2+ + SO4^2- + 2OH^- → Co(OH)2↓ + SO4^2-
The sum of coefficients in the net ionic equation is 6, so the correct answer is A) 6.
Molecular equation: CoSO4 + 2NaOH → Co(OH)2↓ + Na2SO4
Total ionic equation: Co2+ + SO4^2- + 2Na+ + 2OH^- → Co(OH)2↓ + 2Na+ + SO4^2-
Net ionic equation: Co2+ + SO4^2- + 2OH^- → Co(OH)2↓ + SO4^2-
The sum of coefficients in the net ionic equation is 6, so the correct answer is A) 6.