CHEM102 Lecture Notes - Lecture 15: Glenn Mccoy, Playstation 4, Acid Strength

• School: University of Alberta
• Department: Chemistry
• Course: CHEM102
• Professor: Yoram Apelblat

Document Summary

The flying mccoys by glenn and gary mccoy. A sample exam is posted with solutions to be posted over the weekend. 1 l of 0. 15 m benzoic acid + 1 l of 0. 080 m sodium benzoate nha = 0. 150 mol na = 0. 080 mol. + x x (0. 040 + x) x (0. 075 x ) . 0. 075 x = [h3o+] = 1. 26 x 10 4 m. This is the buffer"s initial ph. ph = 3. 90 check. We need to recalculate concentrations (or moles) based on a rxn. Create an ice table with the new concentrations and calculate the position of equilibrium. Hcl + h2o h3o+ + cl nh3o+ = (nhcl )init = 0. 001 mol. Add 1 ml of 1 m hcl 0. 001 mol of ha is formed. Rxn of acid and base h3o+ + a ha + h2o. This is the reverse reaction of an acid dissociation. All h3o+ (from hcl) is converted to ha.