2. Measure and record the temperature of the water in the Styrofoam cup to the nearest 0.1 o c 3. Weigh approximately 2.00 g of NaOH pellets. Use a watch glass as a container for the NaOH. Since NaOH absorbs water from the air, it is necessary to proceed to steps 3 and 4 as soon as the mass of the pellets has been found. 4. Add the NaOH pellets to the water. Insert a thermometer into the lid so that the thermometer bulb is below the solution’s surface. Place the lid on top of the cup. Gently swirl the solution to ensure mixing. 5. Record the highest solution temperature reached in your data chart. Rinse calorimeter with tap water. Shake dry. PART 2 Heat of Neutralization between an acid and a base 1.Pour 25.0 mL of a 1.00 M NaOH solution, measured accurately with a graduated cylinder into the calorimeter. Record the temperature of the NaOH solution (to the nearest 0.1°C). Record the exact molar concentration of the NaOH.
2. Measure 25.0 mL of 1.1 M HCl solution in a clean graduated cylinder. Rinse the thermometer to remove any NaOH and then measure the acid’s temperature (nearest 0.1 ° C). Carefully and quickly, add the acid to the base, replace the lid, and swirl gently.
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