Nest two Styrofoam cups within one another 2. Turn on magnetic stirrer 3. Insert probe into cardboard lid 4. Pour 25mL of water into calorimeter 5. Determine initial temperature of water 6.
Then we just give the sample to TA in order to get the peak. 4. Result and Discussion Steam distillation is a special type of distillation especially for temperature sensitive materials. Many organic compounds, in this case, limonene, tend to decompose at high sustained temperatures. Steam is introduced to the distillation system.
Materials & equipment: - Milk - Water - 30 mL 95% ethanol - 15 drops Glacial acetic acid - 100 mL Graduated cylinder - 125 mL Erlenmeyer flask - Bakers (50 mL and 400 mL) - Electronic balance - Thermometer - Paper cups - Cheese cloth - Rubber band - Buchner filtering apparatus: ring stand, utility clamp, filter paper, vacuum flask, buchner funnel, rubber hose, neoprene adapters(one small and one large). - Heating apparatus: Bunsen burner, ring stand, ring support, wire gauze, burette clamp IV. Procedure: Weigh a flask on an electronic balance. Record data. Using a 100 mL graduated cylinder, measure 80 mL milk, then pour the 80 mL milk into the flask and weigh it again.
Fill the burette with 0.005mol dm-3 potassium manganate(VII) solution. 6. Pour some of the thyme extract solution into a 250cm3 plastic beaker. 7. Using a measuring cylinder, add 50cm3 of 1.0mol dm-3 sulphuric(VI) acid to the thyme extract in the conical flask.
A voltmeter was used to measure the electrical resistance of different solutions. * Experiment and Observation: The plastic and glassware used in this experiment was thoroughly washed with hot water and rinsed with distilled water. * * Part I: Preparation of Standard Phosphate Solutions 1. 1.0 ppm standard: 1.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 1. Cylinder was rinsed with distilled water.
If taken further, this equation can be used to determine molar mass as in PV = (m/M)RT. The equipment used in this experiment is listed as follows: 125 mL Erlenmeyer flask 250 mL graduated cylinder 600 mL beaker 2-in. square of aluminum foil balance barometer Bunsen burner and hose pins rubber band thermometer wire gauze utility clamp approximately 2mL of unknown chemical Procedure: The procedure first starts with weighing the 125 mL flask and then placing about .2 mL of the unknown liquid into the flask. Then, taking the 2-in. Square piece of aluminum foil and folding it over the opening and neck of the flask.
Speed of Sound A. Objective The objective of this laboratory was to measure the speed at which sound was traveling through the air, using the resonance of longitudical waves. B. Equipment Used * Tall glass of water * PVC Pipe, 10 in. * Tape measure, 3 m * Mercury thermometer * Tuning fork, 384 Hz * Marker pencil * Block of wood C. Data Table 1: Tuning fork frequency (Hz) | Length, L Water level to top of the tube (m) | D= diameter of tube (m) | Wavelength=4(L+0.3d)(m) | Room temperature (degrees C) | 384 | 0.218 | 0.020 | 0.896 | 24 | D. Calculations A.
The Effect of Salt on the Boiling Point of Water Purpose: The purpose of this experiment was to test the effect of salt on the boiling point of water. Materials: Three 500 ML beakers Hot Plate Weighing cup Scale Salt Distilled water Thermometer Stirrer Hypothesis: If more salt is added to water then, the boiling point will increase. Independent variable: The dependent variable is the amount of salt put into each beaker filled with 200 ML of water. Dependent Variable: The dependent variable of this experiment is the boiling point of all the different beakers. Control: The control of this experiment is the one beaker filled with 200 ML of water and no salt.
Add 1.0M copper (II) nitrate to the first mark on the test tube. 4. Add 1.5M sodium hydroxide to the second mark on the test tube. Mix with the stirring rod. Touch the bottom of the outside of the test tube to see if heat has been released.
The mobile phase used in this particular experiment was Methanol and 0.1M sodium dihydrogen phosphate at a ratio of 30:70 and a pH of 4.5, slightly acidic. The stationary phase is the silica based particles packed within the column. The key characteristic of HPLC is the sheer pressure it works under. In fact HPLC is often referred to as high pressure liquid chromatography. The pressure at which the machine used in this investigation works is around 1900psi (pounds per square inch) which is the equivalent of 129.29 atmospheres!