CHE 2A Study Guide - Ideal Gas Law, Molar Mass, Orbiting Solar Observatory

• School: UC-Davis
• Department: Chemistry
• Course: CHE 2A
• Professor: A N D R E A S T O U P A D A K I S

Document Summary

Physical forms of reactants and products are not included in equations. Balancing equations for redox reactions in acidic aqueous solutions by half- equation method. 1 balance atoms of all elements except h and o. 4 balance charge by using electrons remember you may have to find lcm least common multiple for electrons then cancel species common to both sides of the overall equation check the charge and number of atoms balance. So3 2- + mno4- so4 2- + mn 2+ O. n. is 4+ in so3 2- to 6+ in so4 2- therefore it is being oxidized (loses e- ) Oxidants are usually chemical substances with elements in high oxidation states (e. g. , h2o2, mno 4, cro3, 4), or else highly electronegative elements (o2, f2, cl2, br2) that can gain extra electrons by oxidizing another substance. O. n. of mn decreases from 7+ in mno4- to 2+ in mn2+ reduced (gains e- )