# How much NA2CO3 is needed for a full reaction with 1.0g CaCl2.2H2O?

$N {a}_{2} C {O}_{3} \left(a q\right) + C a C {l}_{2} \cdot 2 {H}_{2} O \left(a q\right) \rightarrow 2 N a C l \left(a q\right) + C a C {O}_{3} \left(s\right) \downarrow + 2 {H}_{2} O \left(l\right)$