Bohlen exp. 3

Bohlen exp. 3 - Experiment 3 Sensors and Chemical Reactions...

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Experiment 3 – Sensors and Chemical Reactions Name Peter Bohlen Lab Day and Time Monday 1pm TA Rus Section 402 Documentation Lab Manual Exp.2.pdf, Bridgette, Amy Grading Rubric Possible Points Points Received Introduction 20 Balanced equations including states Materials and Methods 10 Only describe deviations Reference lab manual Results and Discussion 50 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 Uses experimental data to clearly expresses how temperature is related to density Error analysis Laboratory Technique 20 TOTAL (100) 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: NH 4 Cl(aq) NH 4 + (aq) + Cl - (aq) Na 2 CO 3 (aq) 2Na + (aq) + CO 3 2- (aq) 3NaHCO 3 (s)+C 6 H 8 O 7 (l) 3CO 2 (g) + 3H 2 O(l) + Na 3 C 6 H 5 O 7 (l) Mg(s) + 2HCl(aq) H 2 (g) + MgCl 2 (aq) CaCO 3 (aq)+ 2HCl(aq) H 2 CO 3 (aq) + CaCl 2 (aq) Mg(OH) 2 (aq) + HCl(aq) 2H 2 O(l) + MgCl 2 (aq) The objective of the experiment was to use the temperature sensor and the pH sensor to monitor the progression of various types of reactions. Materials and Methods The procedure for this experiment was taken from experiment 3, PASCO Sensors and Chemical Reactions. There were no deviations from the lab manual. 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. Data Table 1. Measuring Temperature Change of solution Ammonium chloride Sodium carbonate Mass (g) 1.004 .998 Initial Temperature ( o C) 18.6 18.8 Final Temperature ( o C) 15.9 19.6 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 mole of solute, expressed in the units of o C/mol.
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This note was uploaded on 11/03/2009 for the course BIOL 90726 taught by Professor Weakley during the Spring '09 term at UNC.

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Bohlen exp. 3 - Experiment 3 Sensors and Chemical Reactions...

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