CHM 1301 Study Guide - Quiz Guide: Phenolphthalein, Molar Mass, Sodium Hydroxide

• School: University of Ottawa
• Department: Chemistry
• Course: CHM 1301
• Professor: Natalie Goto

Document Summary

In titrating the hcl with naoh, the solution turned pink upon reaching endpoint\ Instantaneous change in colour once endpoint was reached. Unknown acid clear, transparent solution, slight odour. In titrating the unknown acid with naoh, the solution turned light pink upon reaching endpoint: slow change in colour. Unknown juice light beige, transparent solution, citrus-like odour. In titrating the unknown juice with naoh, the solution turned light pink upon reaching endpoint: slow change in colour. Naoh (aq) + hcl (aq) h2o (l) + na+ (aq) + cl- (aq) Average concentration of stock solution = (trial 1) + (trial 2) + (trial 3) = (0. 107 m) + (0. 105 m) + (0. 107 m) Average concentration of unknown acid = (trial 1) + (trial 2) Average concentration of unknown juice = (trial 1) + (trial 2) Mass % = [(concentration of juice)(molar mass of juice) / (density of juice) (1000)] * 100. = [(0. 027 m)(192 g/mol)] / [(0. 9990 g/ml)(1000)] * 100.