Using a measuring cylinder, add 50cm3 of 1.0mol dm-3 sulphuric(VI) acid to the thyme extract in the conical flask. 8. Titrate the solution in the conical flask with the potassium manganate(VII) solution until a pale pink colour persists for 10 seconds. 9. Repeat the titration until there are two titres within 0.1cm3 of each other.
Nest one Styrofoam cup in another 11. Obtain an exact mass of tap water (45-50g) to serve as cold water 12. Put a magnetic stirrer in the bottom of the calorimeter 13. Secure temperature probe to a ring stand 14. Place temperature probe through hole in cardboard lid and position probe about 1cm above bottom of calorimeter 15.
The mass was recorded and transferred to a 50 ml beaker. 4 ml of 6 M HNO3 was added to the beaker containing the copper. For step 2, 10 ml of distilled water was added to the beaker. Then, 6 M NaOH was added to the solution (drop wise), until placing a drop of the solution on red litmus paper turned it blue. For step 3, the solution was heated with a hot plate.
Prepare the apparatus according to diagram A. 2. Prepare 100 cm3 of 0.2 M hydrochloric acid by mixing 10 cm3 of 2 M hydrochloric acid with 90 cm3 of distilled water. 3. Fill the conical flask with 50 cm3 of 0.2 M hydrochloric acid.
The major findings were that crude oil has a specific boiling point. And gasoline is the first to be distilled then kerosene and then in the end the lubricating oils. Procedure From the Equipment menu, select Distillation Equipment. Obtain the 100 mL Round Bottom Flask. Now right-click on the flask, and select Heating Mantel from Distillation Equipment then, Right-click on the flask, and select Distillation Head from Distillation Equipment last, Right-click on the flask, and select Condenser from Distillation Equipment.
Then by writing a balanced chemical equation and using the titration formula, Nb+Ma+Va=Na+MbVb , the molarity is able to be determined. Procedure: 1) Using the graduated cylinder add 10.0 mL of water into the Erlenmeyer flask. 2) Add 5.0 mL of HCl into the flask using another graduated cylinder because acid goes into water when mixing them. 3) Add three drops of phenolphthalein indicator into the flask. 4) Swirl the flask in circular movements to mix the substances.
Fill a 10 mL graduated cylinder with ≈ 7mL if water c. Fill a 1000 mL beaker with ≈ 750 mL of water d. Invert the graduated cylinder into the beaker. Add water to the beaker to completely submerge cylinder. e. Measure the difference between the height of the water in the graduated cylinder and the height of the water in the beaker. f. g. Record the barometric pressure in mmHg. Heat the water via Bunsen burner to 80°C.
Using a measuring cylinder, pour 20 cm3 of 0.01M saturated cobalt (II) chloride solution at 0℃ and pour about 100 cm3 of deionized water to a 250 cm3 beaker. 2. Stir the mixture using a magnetic stirrer-hotplate. 3. Using a dropper, add 5 drops of concentrated hydrochloric acid to the solution.
APPARATUS: Burette (50 cmᶾ), Pipette (25 cmᶾ), two conical flasks (250 cmᶾ), two beakers (250 cmᶾ), funnel, wash bottle, retort stand, boss and clamp, evaporating dish, pipette filler, hot-plate. MATERIALS: Approximately 2.0 mol dmˉ³ hydrochloric acid, 1.0 mol dmˉ³ sodium hydroxide, methyl orange indicator. METHOD: 1. Firstly, the burette was rinsed with a little hydrochloric acid and filled up to just above the zero mark. 2.
Independent Variables: • The range of pH, between 6-8 pH. Method: 1. Firstly, place the buffer tablets into a test-tube containing 20 ml of water (at room temperature). 2. Once the buffer tablet has dissolved into the water, add 10 ml of starch solution.