human
What are the chemical equations for the reaction of CoBr3 and CaSO4 to form CaBr2 and Co2(SO4)3?
gpt
6 CoBr3 + 3 CaSO4 → 3 CaBr2 + 2 Co3(SO4)3 is incorrect because Co has a  +2 common charge so: 6 CoBr3 is not a likely formula for a cobalt halide;  3 CoBr2 + 3 CaSO4 → 3 CaBr2 + Co2(SO4)3 is more likely,  but Ca2+ is needed to balance the equation in this calcium compound:  6 CoBr2 + 3 CaSO4 → 2 CaBr2 +  3 CaSO4 + 3*2 ' CoBr2 does help as *2 then can form proper  Co2(SO4)3:  6 CoBr2 + 3 CaSO4 → 3 CaBr2 + Co2(SO4)3 is correct.
Explanation: The correct balanced chemical equation requires a 2:1 CoBr2 - CaSO4 ratio and can occur as a double displacement (metathesis).