https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:reaction-rates-and-equilibrium/x2613d8165d88df5e:equilibrium-lechatelier-s-principle/v/le-chatelier-s-principle_hs 2023-12-15T18:39:28.793791463Z Le Châtelier's principle The conditions of a chemical system in equilibrium can change. Le Chatlier's principle says a system at equilibrium responds to changes in predictable ways. The response to a change always occur in a direction that reestablishes equilibrium. And the response to a change always opposes the change to the system. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/4093d691-1792-43ec-94f8-07c6bd9bb505_1280_720_base.png Le Châtelier's principle The conditions of a chemical system in equilibrium can change. Le Chatlier's principle says a system at equilibrium responds to changes in predictable ways. The response to a change always occur in a direction that reestablishes equilibrium. And the response to a change always opposes the change to the system. https://cdn.kastatic.org/ka-youtube-converted/B2pP02GEZL4.mp4/B2pP02GEZL4.mp4 346 Le Chatelier's Principle https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/v/le-chateliers-principle-changing-concentration 2022-09-05T08:18:59.810508578Z Le Chȃtelier’s principle: Changing concentration Le Chȃtelier’s principle can be used to predict the effect that a stress like changing concentration has on a reaction system at equilibrium. If the concentration of a reaction species is increased (at constant T and V), the equilibrium system will shift in the direction that reduces the concentration of that species. If the concentration of a reaction species is decreased, the reverse effect will be observed. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/ce9abdbc-f3f0-4295-b627-4a2af19e90a9_1280_720_base.png Le Chȃtelier’s principle: Changing concentration Le Chȃtelier’s principle can be used to predict the effect that a stress like changing concentration has on a reaction system at equilibrium. If the concentration of a reaction species is increased (at constant T and V), the equilibrium system will shift in the direction that reduces the concentration of that species. If the concentration of a reaction species is decreased, the reverse effect will be observed. https://cdn.kastatic.org/ka-youtube-converted/jjmAGbcKEZY.mp4/jjmAGbcKEZY.mp4 518 Le Chatelier's Principle https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/v/le-chateliers-principle-changing-temperature 2022-09-05T08:18:59.810508578Z Le Chȃtelier’s principle: Changing temperature Le Chȃtelier’s principle can be used to predict the effect that a stress like changing temperature has on a system at equilibrium. If the temperature of the system is increased (at constant V), the system will shift in the direction that consumes the excess heat. If the temperature of the system is decreased, the reverse effect will be observed. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/ea29dc2b-8307-4daa-aad9-7010f1819348_1280_720_base.png Le Chȃtelier’s principle: Changing temperature Le Chȃtelier’s principle can be used to predict the effect that a stress like changing temperature has on a system at equilibrium. If the temperature of the system is increased (at constant V), the system will shift in the direction that consumes the excess heat. If the temperature of the system is decreased, the reverse effect will be observed. https://cdn.kastatic.org/ka-youtube-converted/j7FOzKIDrg8.mp4/j7FOzKIDrg8.mp4 676 Le Chatelier's Principle https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/v/le-chateliers-principle-changing-volume 2022-09-05T08:18:59.810508578Z Le Chȃtelier’s principle: Changing volume Le Chȃtelier’s principle can be used to predict the effect that a stress like changing volume has on a system at equilibrium. If the volume of the container is increased (at constant T), the system will shift in the direction that increases the number of moles of gas in the container. If the volume is decreased, the reverse effect will occur. If the system has the same number of moles of gas on both sides of the chemical equation, a change in volume will have no impact on the equilibrium position. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/7b3ae7b0-ffb3-4e9b-8c78-033cc2516fc6_1280_720_base.png Le Chȃtelier’s principle: Changing volume Le Chȃtelier’s principle can be used to predict the effect that a stress like changing volume has on a system at equilibrium. If the volume of the container is increased (at constant T), the system will shift in the direction that increases the number of moles of gas in the container. If the volume is decreased, the reverse effect will occur. If the system has the same number of moles of gas on both sides of the chemical equation, a change in volume will have no impact on the equilibrium position. https://cdn.kastatic.org/ka-youtube-converted/FmqyKCQo7Tk.mp4/FmqyKCQo7Tk.mp4 669 Le Chatelier's Principle https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/v/worked-example-calculating-the-equilibrium-total-pressure-after-a-change-in-volume 2022-10-05T02:43:18.611402953Z Worked example: Calculating the equilibrium total pressure after a change in volume How does the total pressure change when the volume of a gaseous equilibrium system is reduced? In this video, we'll explore the answer to this question using both qualitative and quantitative approaches. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/f75c8402-d9ce-42d7-913e-cbaaaf438df3_1280_720_base.png Worked example: Calculating the equilibrium total pressure after a change in volume How does the total pressure change when the volume of a gaseous equilibrium system is reduced? In this video, we'll explore the answer to this question using both qualitative and quantitative approaches. https://cdn.kastatic.org/ka-youtube-converted/2q5UPN4tF20.mp4/2q5UPN4tF20.mp4 431 Le Chatelier's Principle https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/e/le-chatelier-s-principle 2023-08-07T17:25:22.494770007Z Le Châtelier's principle Check your understanding of Le Châtelier's principle in this set of free practice questions designed for AP Chemistry students. exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:le-chatelier-s-principle/v/worked-example-using-le-chateliers-principle-to-predict-shifts-in-equilibrium 2022-10-05T02:43:18.611402953Z Worked example: Using Le Chȃtelier’s principle to predict shifts in equilibrium In this video, we'll use Le Chȃtelier’s principle to predict how an equilibrium system will shift in response to various stresses, including changes in concentration, volume, and temperature. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/2e596409-84fa-4c28-a6e5-e9b04f717021_1280_720_base.png Worked example: Using Le Chȃtelier’s principle to predict shifts in equilibrium In this video, we'll use Le Chȃtelier’s principle to predict how an equilibrium system will shift in response to various stresses, including changes in concentration, volume, and temperature. https://cdn.kastatic.org/ka-youtube-converted/YBEoLzMWCdM.mp4/YBEoLzMWCdM.mp4 238 Le Chatelier's Principle https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:reaction-rates-and-equilibrium/x2613d8165d88df5e:equilibrium-lechatelier-s-principle/e/understand-equilibrium-lechateliers-principle 2025-11-10T23:10:47.553327376Z Understand: equilibrium and Le Châtelier’s principle Check your understanding of equilibrium and Le Châtelier’s principle in this set of free practice questions. Allen Ruch exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:reaction-rates-and-equilibrium/x2613d8165d88df5e:equilibrium-lechatelier-s-principle/e/apply-lechateliers-principle 2026-03-11T05:00:37.141016324Z Apply: Le Châtelier's principle Apply your understanding of Le Châtelier's Principle in this set of free practice questions. Allen Ruch exercise https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:chemical-equilibrium/x203b0fc81a964b2d:le-chatelier-s-principle/e/using-le-chatelier-s-principle-exercise 2025-04-30T12:23:21.222584878Z Using Le Chatelier's principle Practice using Le Chatelier's principle to predict what happens to a reaction when a stress is applied Yuki exercise