Given the reaction PCl‚ÄöCE(g) + Cl‚ÄöCC(g) ‚Äöaa PCl‚ÄöCO(g) with Kc …

Chemistry Questions
Short Answer
Step by Step Solution
Chemistry Questions

Given the reaction PCl‚ÄöCE(g) + Cl‚ÄöCC(g) ‚Äöaa PCl‚ÄöCO(g) with Kc = 0.11, a 0.60 mol sample of PCl‚ÄöCE(g) and a 0.70 mol sample of Cl‚ÄöCC(g) are placed in a 1.0 L rigid container. At equilibrium, the concentration of PCl‚ÄöCO(g) is 0.040 M. (a) On the attached graph, draw three curves representing the concentration changes of each gas as equilibrium is established, labeling each curve accordingly.

Short Answer

The chemical reaction between phosphorus trichloride (PCl‚ÄöCE) and chlorine gas (Cl‚ÄöCC) forms phosphorus pentachloride (PCl‚ÄöCO), with changes in the concentrations of the substances over time as they approach equilibrium. Initially, PCl‚ÄöCE and Cl‚ÄöCC decrease in concentration while PCl‚ÄöCO increases, and at equilibrium, PCl‚ÄöCO reaches a concentration of 0.040 M. Graphing these changes illustrates the dynamic relationship of the reactants and products until stabilization occurs.

Step-by-Step Solution

Step 1: Understand the Reaction Dynamics

In the chemical reaction involving phosphorus trichloride (PCl√¢¬C¬E), chlorine gas (Cl√¢¬C¬C), and phosphorus pentachloride (PCl√¢¬C¬O), the concentrations of the reactants and products change as the reaction approaches equilibrium. The reaction can be represented as:

  • PCl‚àö¬¢¬¨C¬¨E(g) + Cl‚àö¬¢¬¨C¬¨C(g) ‚àö¬¢¬¨a¬¨N PCl‚àö¬¢¬¨C¬¨O(g)

Step 2: Track Concentration Changes

Initially, you start with specific amounts of PCl√¢¬C¬E (0.60 mol) and Cl√¢¬C¬C (0.70 mol) in a 1.0 L container. As the reaction proceeds:

  • The concentration of PCl‚àö¬¢¬¨C¬¨E decreases.
  • The concentration of Cl‚àö¬¢¬¨C¬¨C decreases.
  • The concentration of PCl‚àö¬¢¬¨C¬¨O increases.

At equilibrium, the concentration of PCl√¢¬C¬O reaches 0.040 M.

Step 3: Visualize the Concentration Graphs

When you plot the concentrations over time, you will observe distinct curves for each substance:

  • The curve for PCl‚àö¬¢¬¨C¬¨E starts high and gradually decreases.
  • The curve for Cl‚àö¬¢¬¨C¬¨C also starts high and decreases over time.
  • The curve for PCl‚àö¬¢¬¨C¬¨O starts low and rises as the reaction progresses.

This visual representation clearly depicts how the concentrations transition until they stabilize at equilibrium.

Related Concepts

Reaction Dynamics

The study of how reactants interact and change concentration over time during a chemical reaction until they reach a stable state known as equilibrium.

Equilibrium

A state in a chemical reaction where the concentrations of reactants and products remain constant over time, indicating that the forward and reverse reactions occur at equal rates.

Concentration

The amount of a substance (reactant or product) present in a given volume of solution, often expressed in moles per liter (m).

Table Of Contents
  1. Given the reaction PCl‚ÄöCE(g) + Cl‚ÄöCC(g) ‚Äöaa PCl‚ÄöCO(g) with Kc = 0.11, a 0.60 mol sample of PCl‚ÄöCE(g) and a 0.70 mol sample of Cl‚ÄöCC(g) are placed in a 1.0 L rigid container. At equilibrium, the concentration of PCl‚ÄöCO(g) is 0.040 M. (a) On the attached graph, draw three curves representing the concentration changes of each gas as equilibrium is established, labeling each curve accordingly.

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