Where practicable, the weighed dyestuff should be mixed manually with water to a slurry or paste before transfer since tipping dry dyestuff into a mixing vessel will create a dust cloud. Exposure can be also greatly reduced by adding the dye in a water-soluble
Metallurgy can be used in order to recover the chromium from the chromite ore. This experiment is being performed in order to determine if an unknown sample is actually chromite. In order to do this, the sample must be separated using hydrometallurgy. This process consists of extraction of the metal by dissolving the metal in a solvent. The metal must then be recovered and the waste discarded.
Direct weighing simply requires learning how to read the mass directly from the balance, it is pretty straightforward. But we need to check that he balance has been zeroed otherwise we can have a weight error. Weighing by difference requires recording the mass of an object in a container, recording the mass of the container only and then calculate the mass of the object by subtracting the mass of the container from the mass of the object in the container. Major finding: it’s simpler to find the mass with direct weighting than by difference. Procedure Centigram balance- direct weighing technique 1) Obtain the centigram balance 2) Add the copper slug to the balance 3) Record the mass of the cooper slug in (g) 4) Retain scale and slug for future use.
These impurities include vanadium, arsenic, zirconium, iron, silicon, and magnesium. Therefore, impure titanium tetrachloride is then cleaned of all these impurities for the purpose of gaining a pure titanium tetrachloride. The cleaning process is initiated by allowing the former mixture to settle, where the undissolved particles are removed as dirt or mud. Afterwards, the liquid that contains several chlorides is passed through a distillation column and is chemically treated with hydrogen sulfide or mineral oil to eliminate vanadium oxychloride, which is a chloride that boils at the same temperature as titanium tetrachloride. Finally, it is redistilled again to further purify the titanium tetrachloride produced.
Graduated cylinder 8. Calculator 9. Wash bottle Procedure: To commence, first I gathered all the material needed to keep from being too messy with the experiment. Next I went to collect my unknown liquid and metal since the material and purpose was to find the mass and volume of them and located their place of origin from the data collected. Once all the equipment has be gather, step one was to clean the flask because a dirty flask might have an effect on the precise mass of it.
BAMURANGE M.GRATIA G 11 IB GHA CHEMISTRY I.A (Expt i) DETERMINATION OF PURITY. How to determine the percentage of ethanoic acid (CH3COOH) in an impure sample of vinegar. Background information; In chemistry, for a particular experiment, a certain concentration of chemicals is required for certain results to occur or for just security purposes since some are very dangerous to the environment and even the people in general. Vinegar is known to be used to kill germs while preparing salad, which means it should not be used at its high concentration but at a low concentration. If used at high concentration, it can kill the components of food and since the food is to be eaten, it might cause problems in ones digestive parts.
Proving the Law of Conservation of Mass using the Copper Cycle Introduction Copper is used in many important industries such as agriculture, petroleum, ceramics, and even in medicine. In this experiment, different forms of copper will be observed throughout the copper cycle. For the experiment, copper will be reacted through the copper cycle where it will go through different reactions in order to return back into pure copper at the starting point of the cycle. The purpose of the experiment is to demonstrate the law of conservation of mass, which states that while matter can change from one form to another, during a given reaction, the total mass must remain the constant. Materials/Equipment: 50 ml beaker, hot plate, plastic funnel, aspirator, rubber tubing, ring stand, clamp, iron ring, weighing boats, magnetic stir bar, disposable pipet(s), filter flask, Buchner funnel, filter paper, distilled water bottle, stirring rod, watch glass, litmus paper- red, 10 ml graduated cylinder.
The joints should be sealed tight by greasing the ends which will prevent the distillation mixture to leak out. This will also result in incomplete results. 8.) The thermometer was inserted into the spectrum. 9.)
We were dealing with bacteria that has the ability to be harmful and to avoid illness/sickness we need to thoroughly wash our hands and be careful around the bacteria. Another precaution to take was to not cough into or put any bacteria from our bodies into the agar plate. Those bacteria could be extremely dangerous and shouldn’t be cultivated. Observations Located on final page(s) Application Questions 1. The purpose of heating the agar plates in the autoclave prior to inoculating them with microorganisms was to make sure that the lab results were exact.
The copper is then fed to electrolysis for refining. In an aqueous solution copper is dissolved at the anode, the ion moves across the electrolyte to the cathode and plates out. Cu → Cu2+ + 2 e- (anode) Cu2+ + 2 e → Cu (cathode) Aluminum are commercially extracted mainly from bauxite, which is mostly gibbsite (Al(OH)3). The Bayer process is used to refine the bauxite into alumina or aluminum oxide, which