Le Chatelier’s principle states that if a reaction at equilibrium is stressed, it will readjust to maintain equilibrium. This can be affected by concentration, temperature, volume, or partial pressure, in which the equilibrium will counter the change and reestablish equilibrium. Through this lab physical changes will be able to be observed. Procedure Part I 1. Prepare an ice water bath with cold tap water and ice and a very hotwater bath in the two 50 mL beakers and set aside.
Add “some” salt to the ice water. This cools the water down faster. (Mythbusters proved this once. ) 3. Fill the test tube about half way with distilled water and insert the thermometer.
Fill the calorimeter cup approximately 2/3 with distilled water at room temperature and record the mass in Data Table 1 5. Measure the temperature of the tap water in the calorimeter cup and record in Data Table 2. 6. Carefully transfer the metal to the beaker with boiling water. Boil at least 10 minutes.
The water then became saturated. 4. The cold beaker was Beaker A. After Beaker A was tested, Beaker B was tested, which had been sitting on a heater keeping the water inside warm at 30 degrees Celsius. It was filled with KCI five times by the 5g spoon, and then five times again by the 1g spoon.
We then recrystallized our sample using 5 ml of warm acetone that was heated on a hot plate under a hood. The warm acetone was poured in to the beaker with our crude sample and swirled. The beaker with our sample was then placed in to an ice bath to cool and
Then place the water in the 25ml beaker for the heating bath and lower the set-up so that when the 25ml round bottom flask is immersed the beaker is about 2/3 full. 5. When that is finish, using the highest setting on the hot plate heat the water until it is nearly boiling. Then turn the heating bath off. 6.
A melting point will be ran on the aspirin when completely dry. A capillary tube containing the dry aspirin will be placed into the melting-point apparatus. This process is to determine the melting point range of aspirin. First, a hot water bath was created with a 400. mL beaker on a hot plate. The temperature was raised to 70 degrees Celsius and 4.419 g of salicylic acid was measured out on a balance and transferred into a 125. mL Erlenmeyer flask.
Apparatus: • Safety glasses • Bunsen burner • Heat proof mat • Sodium thiosulphate • Hydrochloric acid • 100 ml of conical flask • Stop watch • 50 ml measuring cylinder • 10 ml measuring cylinder • Distilled water • Ice • Apron • Beaker Method 1. Collect safety equipment (apron and safety glasses) 2. Collect all materials and apparatuses 3. Set up the practical for room temperature test. 4.
Extraction of Benzoic Acid Experimental 4.08 g of crude benzoic acid mixture was weighed and placed in a 125 mL Erlenmeyer flask. Then 50 mL of diethyl ether was added into the 125 mL Erlenmeyer flask. Some boiling stones were added before heating the mixture on a steam bath. After the ether began to boil, the ether insoluble material was removed from the ether solution using the technique of Buchner funnel vacuum filtration. Then the filtrate was placed in a 500 mL separatory funnel and 30 mL of 1M NaOH was added into the separatory funnel.