Aqueous potassium sulfide and aqueous cobalt (ii) chloride are mixed, and a double replacement reaction occurs. what is the correct balanced chemical equation?

K2S (aq) + CoCl2( aq) >   2KCl (aq) + CoS (s)
potassium   +  cobalt                potassium chloride  + carbonyl  sulfide 
sulfide          chloride 

carbonyl sulfide :-  it is chemical compound with linear formula (OCS ) normally written as (CoS)  .it does not show its structure . its is colorless flammable gas with an unpleasant odour.
Potassium chloride :-  It is metal halide salt composed of potassium and chlorine. it is odorless and has white or colorless crystal appearance 

Ais the correct answer