https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:reaction-rates/v/rate-of-reaction 2021-01-30T09:10:01Z Introduction to reaction rates The rate of a chemical reaction is defined as the rate of change in concentration of a reactant or product divided by its coefficient from the balanced equation. A negative sign is used with rates of change of reactants and a positive sign with those of products, ensuring that the reaction rate is always a positive quantity. In most cases, concentration is measured in moles per liter and time in seconds, resulting in units of M/s for the reaction rate. Jay video https://cdn.kastatic.org/googleusercontent/cpSAiTKbHANKHeK8VXNbBhHsnmUEUQcPx7y9Bs_45FuGkktvAfGRpuqre4MErFJGvMJVWmKF9fwHow0hA6sF7NJ0 Introduction to reaction rates The rate of a chemical reaction is defined as the rate of change in concentration of a reactant or product divided by its coefficient from the balanced equation. A negative sign is used with rates of change of reactants and a positive sign with those of products, ensuring that the reaction rate is always a positive quantity. In most cases, concentration is measured in moles per liter and time in seconds, resulting in units of M/s for the reaction rate. https://cdn.kastatic.org/ka-youtube-converted/8wIodo1HD4Y.mp4/8wIodo1HD4Y.mp4 554 Measurement of rate of reaction https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:introduction-to-rate-law/v/experimental-determination-of-rate-laws 2021-01-30T09:10:01Z Worked example: Determining a rate law using initial rates data The rate law for a chemical reaction can be determined using the method of initial rates, which involves measuring the initial reaction rate at several different initial reactant concentrations. In this video, we'll use initial rates data to determine the rate law, overall order, and rate constant for the reaction between nitrogen dioxide and hydrogen gas. Jay video https://cdn.kastatic.org/googleusercontent/ONC-Qw5H_0gM_XD14HGTy4ireNRJzIcm7IHbxuTcZ2w0c4-X2FzH8-2n0ZcEt0LRv_MhYPYdbNUaSA4fCnLqcgQg9w Worked example: Determining a rate law using initial rates data The rate law for a chemical reaction can be determined using the method of initial rates, which involves measuring the initial reaction rate at several different initial reactant concentrations. In this video, we'll use initial rates data to determine the rate law, overall order, and rate constant for the reaction between nitrogen dioxide and hydrogen gas. https://cdn.kastatic.org/ka-youtube-converted/Ad0aaYixFJg.mp4/Ad0aaYixFJg.mp4 748 Measurement of rate of reaction