Question

Complete and balance each of the following equations. If no reaction occurs, write NOREACTION.

A)LiOH(aq)+Al(NO3)3(aq)

B)CrBr2(aq)+Na2CO3(aq)

Answer 1

A) Given,

LiOH(aq) + Al(NO₃)₃(aq)

Now, the complete ions for the given reactants are,

Li⁺(aq) + OH^-(aq) + Al³⁺(aq) + 3NO₃^-(aq)

Now, from the solubility chart, Al(OH)₃ is insoluble, it will form precipitate. thus the balanced molecular equation is,

3LiOH(aq) + Al(NO₃)₃(aq) Al(OH)₃(s) + 3LiNO₃(aq)

B) Given,

CrBr₂(aq) + Na₂CO₃(aq)

Now, the complete ions for the given reactants are,

Cr²⁺(aq) + 2Br^-(aq) + 2Na⁺(aq) + CO₃^2-(aq)

Now, from the solubility chart, CrCO₃is insoluble, it will form precipitate. thus the balanced molecular equation is,

CrBr₂(aq) + Na₂CO₃(aq) CrCO₃(s) + 2NaBr(aq)