Question

Write the complete balanced equation for the reaction that occurs when calcium carbonate (CaCO3) reacts with lithium nitride (Li3N) in an aqueous solution.

Answer 1

For the reactants, we have:
calcium carbonate CaCO3
lithium nitride Li3N

For the products, we have:
lithium carbonate Li2CO3
calcium nitride Ca3N2

So, the basic UNBALANCED equation is:
CaCO3 + Li3N ................> Li2CO3 + Ca3N2

Now, we need to balance the equation. This means that we need the number of moles in reactants for each element to be equal to the number of moles in the product for this element.

Balancing the equation, we will get:
3 CaCO3+ 2 Li3N .................> 3 Li2CO3+ Ca3N2

Answer 2

Answer: $3CaCO_3(aq)+2Li_3N(aq)\rightarrow Ca_3N_2+3Li_2CO_3$

Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed.

The mass of products must be same as that of the mass of reactants. For this the number of atoms of each element must be same on both sides of the arrow. Thus we need to balance the chemical equations.

$3CaCO_3(aq)+2Li_3N(aq)\rightarrow Ca_3N_2+3Li_2CO_3$