The Effect of Dilution on Equilibrium - Le Chatelier’s Principle
The video explains how diluting an equilibrium mixture affects concentrations based on Le Chatelier's principle.
00:00:00 This video explains how diluting an equilibrium mixture affects the concentrations of reactants and products, following Le Chatelier's principle.
🔍 Diluting an equilibrium mixture decreases the concentration of ions and disrupts the equilibrium.
⚖️ Le Chatelier's Principle states that the equilibrium will shift to favor the reaction with more dissolved ions.
▶️ In the given reaction mixture, dilution favors the dissociation of HNO2.
00:01:04 Dilution has no effect on the equilibrium constant value. The concentration-time graph of a reaction is affected by dilution, causing a decrease in the concentration of ions and a shift towards the reaction with a greater number of dissolved ions.
🔑 Dilution does not affect the equilibrium constant value.
📈 Dilution changes the shape of the concentration-time graph.
⬇️ Higher concentration substances are more impacted by dilution.
00:02:08 Le Chatelier’s Principle states that when a reaction is diluted, the equilibrium will shift to favor the formation of Fe3+ and SCN- ions, leading to a decrease in the concentration of iron III thiocyanate ion.
⇄ When a solution is diluted, the equilibrium of the reaction shifts to the left, favoring the formation of Fe3+ and SCN- ions.
↗️ Although the concentration of Fe3+ and SCN- ions increases slightly after dilution, it is still lower than the original concentration.
↘️ However, the concentration of iron III thiocyanate ion decreases because the reverse reaction is favored.
00:03:12 The video explains how adding more water affects the equilibrium in a chemical reaction. It also discusses how to determine the concentration time graph after dilution.
🔁 By adding more water, the equilibrium shifts to the left, favoring the reverse reaction and increasing the number of dissolved ions to oppose dilution.
⬇️ When the equilibrium mixture is diluted, there is a sudden drop in concentration for both reactants and products due to more dissolved ions on the reactants, indicating a shift to the left.
🔵 At equilibrium, the reaction mixture is blue.
00:04:15 Le Chatelier’s Principle explains the effect of dilution on equilibrium. Diluting the sample shifts the equilibrium to the left, decreasing the concentration of cobalt chloride ion and increasing the concentration of chloride and cobalt water complex, resulting in a slight color change.
🔵 Diluting the sample of cobalt chloride causes a change in color from blue to paler blue.
⬅️ Adding water decreases the concentration of ions, causing the equilibrium to shift to the left.
🌸 The concentration of cobalt chloride ion decreases, while the concentration of chloride and cobalt water complex increases slightly, resulting in a more pink or paler blue color.
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