from the hotplate and bring back to your bench using the tongs provided ke ull t
ID: 923277 • Letter: F
Question
from the hotplate and bring back to your bench using the tongs provided ke ull tHe hotplate and heat until almost boiling. Then remove the beaker . Measure the temperature of the hot water (T) and then immediately add it to the cold water, stirring with the thermometer. Take readings every 20 seconds after the time of mixing for 1 minute and then readings every 30 seconds up to 5 minutes after the time of mixing. Part 1- Heat of Solution of NaOH (Reaction 1) Count out the number of NaOH pellets required for about 2.00 g and transfer them rapidly to a clean, dry Erlenmeyer flask and stopper it tightly with a rubber stopper. Weigh the stopper, flask, and sodium hydroxide on the top-loading balance. (NaOH is very hygroscopic and this ensures that the minimum amount of water is absorbed by the pellets). Measure 50.0 mL of room temperature deionized water and pour it into the calorimeter. Measure the temperature of the water with the thermometer every 30 seconds until it has reached a stable value. . Rapidly pour the sodium hydroxide pellets into the water in the calorimeter and swirl to dissolve the pellets, being careful not to spill any solution. Replace the stopper in the Erlenmeyer flask. Stir the solution with the thermometer. Record the temperature3 every 20 seconds for 1 minute and then every 30 seconds up to 5 minutes beyond the t mixing. ime of Weigh the empty, stoppered Erlenmeyer flask. Record the mass and determine the exact weight of sodium hydroxide transferred to the calorimeter. Empty, rinse, and dry the calorimeter. Part 2- Heat of Solution for KNO3 (Reaction 2)Explanation / Answer
from the hotplate and bring back to your bench using the tongs provided ke ull t
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