CHE 110L Lecture Notes - Lecture 7: Titration, Antacid, Sodium Hydroxide

• School: Quinnipiac University
• Department: Chemistry
• Course: CHE 110L
• Professor: David Stilwell

Document Summary

The procedure for this experiment can be found on pages 61-63 in general chemistry. Carbon copies of the data table have been attached to the back of this lab report. #mmoles=mm*v(ml) (0. 1066mmol)(50. 00ml)=5. 330 mmol: mmoles of naoh used (b), (0. 147mm)(30. 57ml)=3. 201 mmol, (0. 147mm)(32. 51ml)=3. 404 mmol, moles of h+ reacting with sample (c): C=a-b: 5. 330mmol-3. 201mmol=2. 129 mmol, 5. 330mmol-3. 404mmol=1. 926 mmol, mmols of caco3 reacting with h+: =mmoles h+/2: (2. 129mmol) / (2)=1. 065 mmol, (1. 926mmol) / (2)=0. 9630 mmol, #mmols of caco3 per gram: = mmoles of caco3/sample weight: (1. 065mmol) / (0. 2570g)=4. 142 mmol caco3, (0. 9630mmol) / (0. 2570g)=3. 747 mmol caco3, mass of caco3 per gram, (4. 142mmol)(110. 0g)=414. 6 g/mmol, (3. 747 mmol)(110. 0g)=375. 1 g/mmol, mass of caco3 per tablet: =mass of caco3 * mass of tablet: (414. 6g)(1. 225g)= 507. 9g, (375. 1g)(1. 225g)= 459. 5g, % composition of caco3: = (mass of caco3 per tablet / mass of tablet) * 100: (0. 5070g / 1. 225g) * 100 = 41. 39, (0. 4595g / 1. 225g) * 100 = 37. 511%