CHEM 001B Lecture Notes - Lecture 19: Rate Equation, Reaction Rate Constant, Stoichiometry

• School: UC Riverside
• Department: Chemistry
• Course: CHEM 001B
• Professor: Quan Cheng

Document Summary

Relative reaction rates: relative rates of consumption of reactants and formation of products based on stoichiometry. Rate constant (k): proportionality constant that relates the rate of a reaction to the concentration of reactants. Rate law: rate = k[a]m[b]n: k = rate constant. Effects of concentration of reaction rates: should increase i believe. Clicker quiz #13: x, x, x, x. Integrated rate law: first order: mathematical expression describing the change in concentration of a reactant with time. Half-life (t1/2): the time in the course of a chemical reaction during which the concentration of a reactant decreases by half, from integrated rate law, when [x]t = [x]o. The radioactive isotope 32p decays by first order kinetics and has a half-life of 14. 3 days. How long does it take for 95. 0% of a sample of 32p to decay: t1/2 = 0. 693/k. [] = (cid:882). (cid:888)(cid:882)(cid:885)= (cid:1863)(cid:1872)(cid:2869)/(cid:2870: (cid:1864)[](cid:3117)/(cid:3118) (cid:1872)(cid:2869)(cid:2870)=(cid:883)(cid:886). (cid:885) (cid:1871) (cid:1872)(cid:2869)(cid:2870)=(cid:882). (cid:888)(cid:891)(cid:885)(cid:1863) (cid:1863)=(cid:882). (cid:888)(cid:891)(cid:885)(cid:1872)(cid:2869)/(cid:2870) =(cid:882). (cid:882)(cid:886)(cid:890)(cid:886)(cid:888) (cid:2869) (cid:1864)= (cid:1863)(cid:1872)