ni(no3)2(aq) + na2s(aq) → nis(s) + nano3(aq)\nexpress your answer as a chemical equation including…

ni(no3)2(aq) + na2s(aq) → nis(s) + nano3(aq)\nexpress your answer as a chemical equation including phases.\na chemical reaction does not occur for this question.\npart c\nna2so4(s) + c(s) → na2s(s) + co2(g)\nexpress your answer as a chemical equation including phases.\na chemical reaction does not occur for this question.

ni(no3)2(aq) + na2s(aq) → nis(s) + nano3(aq)\nexpress your answer as a chemical equation including phases.\na chemical reaction does not occur for this question.\npart c\nna2so4(s) + c(s) → na2s(s) + co2(g)\nexpress your answer as a chemical equation including phases.\na chemical reaction does not occur for this question.

Answer

Explanation:

Step1: Balance the first equation

The un - balanced equation is $Ni(NO_3)_2(aq)+Na_2S(aq)\rightarrow NiS(s)+NaNO_3(aq)$. There are 2 nitrate ions on the left - hand side and 1 on the right - hand side, and 2 sodium ions on the left - hand side and 1 on the right - hand side. By putting a coefficient of 2 in front of $NaNO_3$, the balanced equation is $Ni(NO_3)_2(aq)+Na_2S(aq)\rightarrow NiS(s)+2NaNO_3(aq)$.

Step2: Balance the second equation

The un - balanced equation is $Na_2SO_4(s)+C(s)\rightarrow Na_2S(s)+CO_2(g)$. For the carbon and oxygen atoms, we need 2 moles of carbon to balance the oxygen atoms in $Na_2SO_4$. The balanced equation is $Na_2SO_4(s)+2C(s)\rightarrow Na_2S(s)+2CO_2(g)$.

Answer:

$Ni(NO_3)_2(aq)+Na_2S(aq)\rightarrow NiS(s)+2NaNO_3(aq)$; $Na_2SO_4(s)+2C(s)\rightarrow Na_2S(s)+2CO_2(g)$