Copper being much less reactive can be easily extracted by heating with various substances to remove its impurities. Copper compounds are heated to react with oxygen and pure copper is left, and can be refined with electrolysis. Copper ores used for commercial production of copper metal are typically chalcopyrite (CuFeS2) and chalcocite (Cu2S), which are sulfides of copper. Due to the low concentration of copper, raw minerals are crushed to small sizes and concentrated by froth flotation. The resulting material is heated with silica (SiO2) in flash smelting to remove the iron as slag.
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.
Each and every time testing urine for metals one must make sure that she/he tests it before injection or administration of any chelation therapy agent. Those individuals that have metal amounts which are normal in their bodies will be removed by chelation therapy and that will result to non-reliable chelation therapy for diagnosis of poisoning
The term Cp is the specific heat of the material (at constant atmospheric pressure). Different materials have different specific heat values. The units of specific heat are : Joules/gram deg – C. In this lab we will find the specific heat value of Zinc and compare it to accepted values.This will do by heating a mass of Zinc up to the temperature of boiling water and placing the hot metal into a cup of cold water. The thermal energy that the zinc loses goes into heating up the water in the cup. By knowing the starting temperatures and the final temperature of the water and the zinc, the specific heat of Zinc may be easily obtained.
Lastly, we got to witness and test the Law of Conservation of Mass through the reaction in this experiment. The list goes on, but these are just a few objectives from the recently conducted lab experiment. Background: Before this experiment we had knowledge on the safety of most of the materials we worked with. Copper (II) Sulfate is harmful by inhalation or ingestion. Iron (II) Sulfate is also harmful if ingested, and could cause death.
The boiling point can be reduced because of the vapour pressure of it would be the sum of water’s vapour pressure and the compound’s vapour pressure. (http://www.brynmawr.edu/chemistry/Chem/mnerzsto/steam_distillation.htm) According to this experiment, A here is the water and B is the clove. Because liquid boil in atmosphere pressure, so with the existence of water that have boiling point at 100ᵒC, the atmosphere pressure could be reached sooner. The solution resulted from the distillation in this experiment was extracted. To do extraction,
Steam Distillation: The isolation of limonene 1. Purpose The purpose of the experiment is to be familiar with the use of steam distillation, to learn how to extract an organic solvent and remove a volatile liquid by a rotary evaporator, and to determine the purity of the limonene. Steam distillation was used because it is a special type of distillation especially for temperature sensitive materials. Dichloromethane was used to extract the aqueous mixture. Magnesium sulfate was used to absorb water and simple filtration was used to remove magnesium sulfate.
Ref: ndt-ed.org The part must be cleaned to remove any excess penetrant or developer. Any spray left on the part can interfere with the next inspection performed on it. 4. What is capillary action? Ref: Lesson #3 The spontaneous elevation or depression of a liquid in fine hair like tubes.
When an indicators color changes it shows the presence of an organic compound. The purpose of using distilled water as one of the substances is that it is the control so you can see the differences. Also, in the substances distilled water was mixed in with them. The control group in part C is distilled water. The purpose of washing the test tubes thoroughly is so the chemicals don’t cross contaminate and affect the outcome of another section of the lab.
Distillation Experiment CHM226 Background The distillation process is a very important technique used to separate compounds based on their boiling points. A substance will boil only when the vapor pressure of the liquid is equal to the external pressure being applied by the surroundings. Distillations can be used to efficiently purify volatile (i.e. low boiling) compounds. The general concept of distillation involves the boiling of a mixture, resulting in the lower boiling compounds boiling off first.