https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:introduction-to-rate-law/v/rate-law-and-reaction-order 2021-01-30T09:09:59Z Rate law and reaction order A rate law shows how the rate of a chemical reaction depends on reactant concentration. For a reaction such as aA → products, the rate law generally has the form rate = k[A]ⁿ, where k is a proportionality constant called the rate constant and n is the order of the reaction with respect to A. The value of n is not related to the reaction stoichiometry and must be determined by experiment. Jay video https://cdn.kastatic.org/googleusercontent/2FVDndiOeAriHtoqflclHvAJLQ727WeullpjFKMgKTMZcsYRGS4N1Q5vYeiSNXIHdK4GKdQpEpI-zogdDChb8R0E Rate law and reaction order A rate law shows how the rate of a chemical reaction depends on reactant concentration. For a reaction such as aA → products, the rate law generally has the form rate = k[A]ⁿ, where k is a proportionality constant called the rate constant and n is the order of the reaction with respect to A. The value of n is not related to the reaction stoichiometry and must be determined by experiment. https://cdn.kastatic.org/ka-youtube-converted/6Ng8ayarWHw.mp4/6Ng8ayarWHw.mp4 639 Rata law, rate constant and order of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:introduction-to-rate-law/e/introduction-to-rate-law 2023-08-07T17:25:22.494770007Z Introduction to rate law Check your understanding of rate law and reaction order in this set of free practice questions designed for AP Chemistry students. exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:concentration-changes-over-time/v/zero-order-reactions 2022-10-05T02:43:18.611402953Z Zero-order reactions The integrated rate law for the zero-order reaction A → products is [A]_t = -kt + [A]_0. Because this equation has the form y = mx + b, a plot of the concentration of A as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to -k. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/a478ed10-b8a2-49ed-be8e-8cb8ad6be80c_1280_720_base.png Zero-order reactions The integrated rate law for the zero-order reaction A → products is [A]_t = -kt + [A]_0. Because this equation has the form y = mx + b, a plot of the concentration of A as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to -k. https://cdn.kastatic.org/ka-youtube-converted/aXf3e8a1teo.mp4/aXf3e8a1teo.mp4 282 Rata law, rate constant and order of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:concentration-changes-over-time/v/first-order-reactions 2022-10-05T02:43:18.611402953Z First-order reactions The integrated rate law for the first-order reaction A → products is ln[A]_t = -kt + ln[A]_0. Because this equation has the form y = mx + b, a plot of the natural log of [A] as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to -k. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/cca727e4-67f4-464a-8393-d78eb43f08ff_1280_720_base.png First-order reactions The integrated rate law for the first-order reaction A → products is ln[A]_t = -kt + ln[A]_0. Because this equation has the form y = mx + b, a plot of the natural log of [A] as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to -k. https://cdn.kastatic.org/ka-youtube-converted/PVqWOehVTOg.mp4/PVqWOehVTOg.mp4 464 Rata law, rate constant and order of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:concentration-changes-over-time/v/second-order-reactions 2022-09-11T01:04:41.009667842Z Second-order reactions The integrated rate law for the second-order reaction A → products is 1/[A]_t = kt + 1/[A]_0. Because this equation has the form y = mx + b, a plot of the inverse of [A] as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to k. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/c9220685-11ec-4fb9-977a-d27b9f5c54fb_1280_720_base.png Second-order reactions The integrated rate law for the second-order reaction A → products is 1/[A]_t = kt + 1/[A]_0. Because this equation has the form y = mx + b, a plot of the inverse of [A] as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to k. https://cdn.kastatic.org/ka-youtube-converted/YgWmHssKVvQ.mp4/YgWmHssKVvQ.mp4 463 Rata law, rate constant and order of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:introduction-to-rate-law/v/finding-units-of-rate-constant-k 2021-01-30T09:09:59Z Units of the rate constant The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s). Yuki Jung video https://cdn.kastatic.org/googleusercontent/u0EkvhDBHJPVmJ2-mTIjuVzYwhyP6yQIT8_vNJLBkd3-_VZxvoMm_c_qB4w0FLeDaoJkt5mx4VFyMyHVAt74UgxB Units of the rate constant The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s). https://cdn.kastatic.org/ka-youtube-converted/fLL8xxjhDPI.mp4/fLL8xxjhDPI.mp4 309 Rata law, rate constant and order of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:concentration-changes-over-time/e/concentration-changes-over-time 2023-08-07T17:25:22.494770007Z Concentration changes over time Check your understanding of the integrated rate laws and half-life in this set of free practice questions designed for AP Chemistry students. exercise