Mitchell Graded Exp 3

Mitchell Graded Exp 3 - Experiment 3 Sensors and Chemical...

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Experiment 3 – Sensors and Chemical Reactions Spring 2008 Name Lab Day and Time TA Section Documentation Grading Rubric Possible Points Points Received Introduction 20 18 Balanced equations including states Materials and Methods 10 10 Only describe deviations Reference lab manual Results and Discussion 50 34 Inserted titles for tables Inserted graphs into template Inserted captions for each graph Showed complete sample calculations Summarized all data in tables Answered questions correctly Error analysis Laboratory Technique 20 20 TOTAL (100) 82 TA Comments/Suggestions:
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C HEMISTRY 11L R EPORT T EMPLATE EXPT. Sensors and Chemical Reactions 3 Introduction The purpose of this report is to classify and describe the following reactions: HCl OH NH O H Cl NH + + 4 2 4 NaOH CO H O H CO Na 2 2 3 2 2 3 2 + + 7 5 6 2 2 3 7 8 6 3 3 3 O H NaC O H CO NaHCO O H C + + + 2 2 H MgCl HCl Mg + + MgCl 2 -2 2 2 2 3 2 CO O H CaCl HCl CaCO + + + O H MgCl HCl OH Mg 2 2 2 2 2 ) ( + + The objective of the experiment was to use the temperature sensor and the pH probe to monitor the progression of various types of reactions. Materials and Methods The procedure for this experiment was taken from the University of North Carolina at Chapel Hill Chemistry 101 Lab Manual. There were no deviations from the given procedure. Results and Discussion The first part of the experiment consisted of measuring the temperature change for the dissolution of ammonium chloride and sodium carbonate in water. The raw data for these experiments are summarized in Data Table 1. o C) for NH 4 Cl and Na 2 CO 3 dissolved in water.-5 Ammonium chloride Sodium carbonate Mass (g) 1.000 g 1.000 g Initial Temperature ( o C) 22.6 o C 22.5 o C Final Temperature ( o C) 20.3 o C 23.3 o C
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To compare the heat of solution for the two reactions, the final analysis must be expressed in similar units. In this experiment, the heat of solution will be expressed as the change in temperature per
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Mitchell Graded Exp 3 - Experiment 3 Sensors and Chemical...

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