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Le Chatelier's Principle

Q. If HNO3 is added to this solution, would you expect to see more or less of the precipitate (CaC2O4) formed in the solution?

Solved • Mar 3, 2020

Le Chatelier's Principle

Q. The following diagrams (Figure 1) represent aqueous solutions of two monoprotic acids, HA (A = x or Y). The water molecules have been omitted for clarity. If you mix equal concentrations of HX and NaY, will the equilibrium HX(aq) + Y^-(aq) ⇌ HY(aq) + X^-(aq) lie mostly to the right (Kc> 1) or to the left (Kc< 1)?

Solved • Feb 23, 2020

Le Chatelier's Principle

Q. Consider the following system at equilibrium where Kc = 1.80x10^-4 and ΔH° = 92.7 kJ/mol at 298 K. NH4HS (s) ⇌ NH3 (g) + H2S (g) The production of NH3 (g) is favored by: Indicate True (T) of False (F) for each of the following: 1. increasing the temperature 2. decreasing the pressure (by changing the volume). 3. decreasing the volume 4. adding NH4HS 5. removing H2S

Solved • Feb 19, 2020

Le Chatelier's Principle

Q. Consider the following system at equilibrium where Kc = 154 and ΔH° = -16.1 kJ/mol at 298 K. 2 NO (g) + Br2 (g) ⇌ 2 NOBr (g) The production of NOBr (g) is favored by: Indicate True (T) of False (F) for each of the following: 1. decreasing the temperature 2. decreasing the pressure (by changing the volume). 3. decreasing the volume 4. removing NOBr 5. adding Br2.

Solved • Feb 19, 2020

Le Chatelier's Principle

Q. Consider the following system at equilibrium where Kc = 6.50x10^-3 and ΔH° = 16.1 kJ/mol at 298 K. 2 NOBr (g) ⇌ 2 NO (g) + Br2 (g) The production of NO (g) is favored by: Indicate True (T) of False (F) for each of the following: 1. increasing the temperature 2. increasing the pressure (by changing the volume). 3. increasing the volume 4. adding NOBr 5. removing Br2.

Solved • Feb 19, 2020

Le Chatelier's Principle

Q. Consider the following system at equilibrium where ΔH° = 16.1 kJ, and Kc = 154, at 298 K. 2NO (g) + Br2 (g) ⇌ 2NOBr (g) If the TEMPERATURE on the equilibrium system is suddenly increased: The concentration of Br2 will: A. Increase. B. Decrease. C. Remain the same.

Solved • Feb 19, 2020

Le Chatelier's Principle

Q. Consider the following system at equilibrium where ΔH° = 10.4 kJ, and Kc = 1.80x10^-2, at 698 K. 2HI(g) ⇌ H2(g) + I2(g) If the TEMPERATURE on the equilibrium system is suddenly increased: The concentration of I2 will: a) Increase b) decrease c) Remain the same

Solved • Feb 19, 2020