CHEM 1011 Study Guide - Final Guide: Copper, Phosphorus Trichloride, Buffer Solution

• School: Dalhousie University
• Department: Chemistry
• Course: CHEM 1011
• Professor: Patricia Laws

Document Summary

1) a 1. 00 g sample of a compound is combusted in excess oxygen. The products of this combustion are 2. 492 g of co2 0. 6495 g of h2o. Determine the empirical formula for the compound. If the molar mass of the compound is 388. 46 g/mol, determine the molecular formula for the compound. 2) identify the conjugate acid for the following species: (a) nh3 (b) na2o (c) ch3coo- (d) benzoate ion (e)hso4- . 3) identify the conjugate base for the following species: (a) hclo4 (b) hso4- (c) hclo3 (d) h3po4 (e) oxalic acid. 5) the ph of a 8. 11 x 10- 3 m solution of weak base is 7. 81. 6) the pka of a weak acid is 4. 23. 7) predict whether aqueous solutions of the salts will be acidic, neutral, or basic: (a)nach3coo (b)kcl (c)nh4br (d)cao. 8) a 250 ml solution of 0. 350 m ch3cooh is added to 116 ml of 0. 750 m lich3coo. Determine the ph of this buffer.