[cassie]

I stink at these and I want to know if I picked the right answer
Given the reaction, CoCO₃+2HBr :rarrow:CoBr₂+H₂0+CO₂ the resulting NET ionic equation is:
a) CoCO₃+2H⁺  Co²⁺+H₂CO₃
b) Co²⁺+ CO₃^2-+2HBr Co²⁺+Br₂^-+H₂O+CO₂
c)CoCO₃+2HBr Co²⁺+Br₂^-+H₂O+CO₂
d)CoCO₃+2H⁺ Co²⁺+H₂O+CO₂
e)CoCO₃+2HBr Co²⁺+2Br^-+H₂O+CO₂

I guessed letter e. Thank you! 

[Donut]

You have to cancel out your spectator ions to get the net ionic equation

Molecular equation : CoCO3 (s) + 2HBr (aq) --> CoBr2 (aq) + H2O (l) + CO2 (g)

Net ionic: CoCO₃ + 2H⁺ --> Co²⁺ + H₂O + CO₂

Note how the bromide ion is missing from the net ionic equation as it was a spectator ion.

So, I would choose D