Question

When mixed, solutions of aluminium nitrate, AI(N03)3, and ammonium carbonate, (NH4)2CO3, will form a precipitate of aluminium carbonate, AI2(C03)3. The balanced equation is: 2AI(N03)3(aq)+3(NH4)2CO3(aq)----AI2(CO3)3 (S)+ 6NH4NO3(aq). which of the following statements regarding the reaction is incorrect. A)2 moles of AI(NO3)3 will react with 3 moles of (NH4)2CO3. B) if 6 moles of (NH4)2 CO3 react with sufficient AI(NO3)3, 2 moles of AI2(CO3)3 will be formed. C) if 0.5 mole of (NH4)2CO3 react with sufficient AI(NO3)3, 3 moles of AI2(CO3)3 will be formed. D) if 1.5 moles of AI2(CO3)3 are formed, given sufficient starting materials, then 9 moles of NH4NO3 will also be formed. E)4 moles of AI2(NO3)3 will react with 6 moles of (NH4)2CO3.

Answer 1

balance chemical precipitate reaction.

2Al(NO₃)₃ (aq) + 3(NH₄)₂CO₃ (aq) ---------> Al₂(CO₃)₃ (s) + 6NH₄NO₃ (aq)   

according to balance reaction ratio of reactant and product are 2 : 3 : 1 : 6 so,

A) 2 moles of Al(NO3)3 will react with 3 mole of (NH4)2CO3 is correct.

B)   if 6 moles of (NH4)2 CO3 react with sufficient AI(NO3)3, 2 moles of AI2(CO3)3 will be formed is correct.

C) if 0.5 mole of (NH4)2CO3 react with sufficient AI(NO3)3, 3 moles of AI2(CO3)3 will be formed. is wrong.

according to balance reaction if 0.5 mole of (NH4)2CO3 react with sufficient Al(NO3)3 than 0.5/3 mole of Al2(CO3)3 is formed.

D) if 1.5 moles of AI2(CO3)3 are formed, given sufficient starting materials, then 9 moles of NH4NO3 will also be formed is correct.

E) 4 moles of AI2(NO3)3 will react with 6 moles of (NH4)2CO3 is correct.

only option C is wrong