Acompound was found to be soluble in water. it was also found that addition of acid to an aqueous solution of this compound resulted in the formation of carbon dioxide. which one of the following cations would form a precipitate when added to an aqueous solution of this compound?

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-