# How would you balance: Na2CO3 + BaCl2 --> NaCl + BaCO3?

$N {a}_{2} C {O}_{3} \left(a q\right) + B a C {l}_{2} \left(a q\right) \rightarrow 2 N a C l \left(a q\right) + B a C {O}_{3} \left(s\right) \downarrow$
Is this equation balanced with respect to mass? How do you know? What do I mean by $B a C {l}_{2} \left(a q\right)$; how is this different to $B a C {O}_{3} \left(s\right)$?