ammonium bisulfide
le chateliers principle iii

the contents of the container are transferred from the original $4.00\text{ l}$ vessel to a $2.00\text{ l}$ vessel.

\\text{nh}_3(g) + \text{h}_2\text{s}(g) \
ightleftharpoons \text{nh}_4\text{hs}(s)\

$k = 400.$ @ $35.0\text{ }^\circ\text{c}$ $\delta h_{\text{rxn}} = -83.4\text{ kj}$

how does the concentration of $\text{nh}_3$ change when the equilibrium is disturbed as described?

- the $\text{nh}_3$ concentration remains unchanged.
- the $\text{nh}_3$ concentration decreases.
- the $\text{nh}_3$ concentration increases.
- there is not enough information to determine the change in $\text{nh}_3$ concentration.

Question

ammonium bisulfide
le chateliers principle iii

the contents of the container are transferred from the original $4.00\text{ l}$ vessel to a $2.00\text{ l}$ vessel.

\\text{nh}_3(g) + \text{h}_2\text{s}(g) \
ightleftharpoons \text{nh}_4\text{hs}(s)\

$k = 400.$ @ $35.0\text{ }^\circ\text{c}$ $\delta h_{\text{rxn}} = -83.4\text{ kj}$

how does the concentration of $\text{nh}_3$ change when the equilibrium is disturbed as described?

- the $\text{nh}_3$ concentration remains unchanged.
- the $\text{nh}_3$ concentration decreases.
- the $\text{nh}_3$ concentration increases.
- there is not enough information to determine the change in $\text{nh}_3$ concentration.

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Chemical Equilibrium", "Le Chateliers Principle", "Heterogeneous Equilibrium" ], "new_concepts": [], "current_concepts": [ "Chemical Equilibrium", "Le Chateliers Principle", "Heterogeneous Equilibrium" ] } ## Write the equilibrium expression Using the *Heterogeneous Equilibrium* and *Chemical Equilibrium* knowledge points $$ \begin{aligned} &\text{Reaction: } \mathrm{NH_3(g) + H_2S(g) ightleftharpoons NH_4HS(s)}\ &K_c = \frac{1}{[\mathrm{NH_3}][\mathrm{H_2S}]} \end{aligned} $$ ## Analyze the volume change Using the *Le Chateliers Principle* knowledge point $$ \begin{aligned} &V_{\text{initial}} = 4.00\text{ L} \to V_{\text{final}} = 2.00\text{ L}\ &Q_c = \frac{1}{[\mathrm{NH_3}]_{\text{inst}}[\mathrm{H_2S}]_{\text{inst}}} = \frac{1}{(2[\mathrm{NH_3}]_{\text{eq}})(2[\mathrm{H_2S}]_{\text{eq}})} = \frac{1}{4} K_c < K_c \end{aligned} $$ ## Determine the shift and final concentrations Using the *Le Chateliers Principle* and *Chemical Equilibrium* knowledge points $$ \begin{aligned} &Q_c < K_c \implies \text{Reaction shifts right to restore equilibrium}\ &\text{At new equilibrium: } [\mathrm{NH_3}]_{\text{new}}[\mathrm{H_2S}]_{\text{new}} = \frac{1}{K_c} = [\mathrm{NH_3}]_{\text{eq}}[\mathrm{H_2S}]_{\text{eq}}\ &\text{Since reactants are in a 1:1 ratio: } [\mathrm{NH_3}]_{\text{new}} = [\mathrm{NH_3}]_{\text{eq}} \end{aligned} $$

The $\text{NH}_3$ concentration remains unchanged.

The $\text{NH}_3$ concentration decreases.

The $\text{NH}_3$ concentration increases.

There is not enough information to determine the change in $\text{NH}_3$ concentration.

{ "subject": "Natural Science", "question_type": "Multiple Choice", "knowledge_point": [ "Natural Science", "Chemistry", "Chemical Equilibrium" ] }

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Write the equilibrium expression

Analyze the volume change

Determine the shift and final concentrations

Answer: