Question

he balanced net ionic equation for precipitation of CaCO 3 when aqueous solutions of Na 2CO 3 and CaCl 2 are mixed is ________. 2Na (aq) CO32- (aq) Na2CO3 (aq) 2Na (aq) 2Cl- (aq) 2NaCl (aq) Na (aq) Cl- (aq) NaCl (aq) Ca (aq) CO32- (aq) CaCO3 (s) Na2CO3 (aq) CaCl2 (aq) 2NaCl (aq) CaCO3 (s)

Answer 1

Answer:

Net ionic equation: $Ca^{2+}(aq.)+CO_{3}^{2-}(aq.)\rightarrow CaCO_{3}(s)$

Explanation:

Reaction between $Na_{2}CO_{3}$ and $CaCl_{2}$ is an example of double decomposition reaction where each cations and anions of each salt exchange their partners during reaction to form $CaCO_{3}$ and NaCl

$CaCO_{3}$ is an insoluble salt. Hence precipitation of $CaCO_{3}$ has been observed.

Molecular equation: $Na_{2}CO_{3}(aq.)+CaCl_{2}(aq.)\rightarrow 2NaCl(aq.)+CaCO_{3}(s)$

Total ionic equation:

$2Na^{+}(aq.)+CO_{3}^{2-}(aq.)+Ca^{2+}(aq.)+2Cl^{-}(aq.)\rightarrow CaCO_{3}(s)+2Na^{+}(aq.)+2Cl^{-}(aq.)$

Here $Na^{+}$ and $Na^{+}$ are spectator ions. Therefore they are eliminated from both side of total ionic equation to get net ionic equation.

Net ionic equation: $Ca^{2+}(aq.)+CO_{3}^{2-}(aq.)\rightarrow CaCO_{3}(s)$