Chapter 2, Problem 2.101QP

Interpretation Introduction

Interpretation:

Balanced equation for the given reaction has to be written along with the phase labels and also the reactants are heated has to be indicated.

Answer to Problem 2.101QP

The balanced equation with phase labels for the reaction is given as,

${\text{2NH}}_{\text{4}}{\text{Cl}}_{\left(aq\right)}\text{+}{\text{Ba(OH)}}_{\text{2}}{}_{\left(aq\right)}\stackrel{\text{Δ}}{\to }{\text{2NH}}_{\text{3}}{}_{\left(g\right)}\text{+}{\text{BaCl}}_{\text{2}}{}_{\left(aq\right)}\text{+}{\text{2H}}_{\text{2}}{\text{O}}_{\left(l\right)}$

Explanation of Solution

The given reaction in the problem statement is ammonium chloride and barium hydroxide is heated to give ammonia gas, barium chloride and water as products.  The raw equation can be written as,

${\text{NH}}_{\text{4}}\text{Cl}\text{+}{\text{Ba(OH)}}_{\text{2}}\stackrel{\text{Δ}}{\to }{\text{NH}}_{\text{3}}\text{+}{\text{BaCl}}_{\text{2}}\text{+}{\text{H}}_{\text{2}}\text{O}$

For balancing the above chemical equation, start with balancing oxygen.  To balance oxygen add coefficient “2” in front of ${\text{H}}_{\text{2}}\text{O}$.  Then the equation becomes,

${\text{NH}}_{\text{4}}\text{Cl}\text{+}{\text{Ba(OH)}}_{\text{2}}\stackrel{\text{Δ}}{\to }{\text{NH}}_{\text{3}}\text{+}{\text{BaCl}}_{\text{2}}\text{+}2{\text{H}}_{\text{2}}\text{O}$

The above equation can be balanced by adding coefficient “2” before ${\text{NH}}_{\text{4}}\text{Cl}$ and ${\text{NH}}_{\text{3}}$.  Then the equation becomes,

${\text{2NH}}_{\text{4}}\text{Cl}\text{+}{\text{Ba(OH)}}_{\text{2}}\stackrel{\text{Δ}}{\to }2{\text{NH}}_{\text{3}}\text{+}{\text{BaCl}}_{\text{2}}\text{+}2{\text{H}}_{\text{2}}\text{O}$

The phase labels has to for the compounds can be given as shown below,

${\text{2NH}}_{\text{4}}{\text{Cl}}_{\left(aq\right)}\text{+}{\text{Ba(OH)}}_{\text{2}}{}_{\left(aq\right)}\stackrel{\text{Δ}}{\to }{\text{2NH}}_{\text{3}}{}_{\left(g\right)}\text{+}{\text{BaCl}}_{\text{2}}{}_{\left(aq\right)}\text{+}{\text{2H}}_{\text{2}}{\text{O}}_{\left(l\right)}$

Conclusion

The balanced chemical equation for the reaction given in the problem statement was written along with phase labels.