Summary of Lab Procedure EXPERIMENT #4

Summary of Lab Procedure EXPERIMENT #4 - Introduction to...

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Introduction to Calorimetry Summary Materials: 1 Calorimeter 1 50 ml graduated cylinder 1 magnetic stir bar 1 slit rubber stopper 1 thermometer 1 magnetic stirrer Prepare the apparatus 1. Weigh on top loading balance clean + dry calorimeter (lid and magnetic stir bar) 2. Record mass on data sheet 3. Insert thermometer into split rubber stopper (alcohol column should be visible above stopper + adjust height so tip is approx. 2.5 cm from bottom of calorimeter when placed into the calorimeter lid) Part A: Heat of dissolution of NaOH 1. Measure 250 ml deionized water pour into calorimeter + place in magnetic stirrer 2. Make sure stirring at steady rate w/o splattering 3. Replace calorimeter cover, insert thermometer + let stand for one minute 4. Meanwhile, weigh approx.. 10 g sodium hydroxide pellets into small, clean, and dry beaker record exact mass 5. Read temp of water in calorimeter record on data sheet (nearest 10 th of a degree) 6.
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