CHEM 101L Lecture Notes - Lecture 4: Endothermic Process, Calcium Carbonate, Ammonium Chloride

• School: UNC
• Department: Chemistry
• Course: CHEM 101L
• Professor: Nita Eskew

Document Summary

3nahco3 (aq) + h3a (aq) -> na3a (aq) + 3h20 (l) + 3co2 (g) 2hcl (aq) + mg (s) -> mgcl2(aq) + h2 (g) Effectiveness of acid neutralizing in whole and crushed antacid tablets. Class data for antacid effectiveness (crushed vs. whole and name-brands) Write a conclusion to your findings in experiment 4. Be sure to discuss specifics of your experiment for all portions of the experiment and sources of error. Refer to the unc writing center at (http://writingcenter. unc. edu/resources/handouts-demos/specific-writing-assignments/scientific- reports#section-22) for some help. This should be no longer than 2 paragraphs. The first part of this experiment was used to test the change in temperature over time between ammonium chloride with water and sodium carbonate also with water. The results show that, when added to water, ammonium chloride looses heat or has an exothermic reaction with the water. The results also show that when sodium carbonate is added to the water, it gains heat and creates an endothermic reaction.