Introduction:
Chromium is a metal-looking element that is used for many industrial purposes, such as metal plating, leather processing, pigments, surface treatments, refractories, and catalysts. The only ore of chromium is the mineral chromite, or iron magnesium chromium oxide. In mold to utilize chromium, it must be extracted from the chromite ore. The process of removing a metal(prenominal) element from its ore is called extractive metallurgy.
One get to of extractive metallurgy, called hydrometallurgy, uses aqueous solution chemistry for the recovery of metals from salts minerals or ores. The first spirit of hydrometallurgy, called extraction, is the process of removing metal from the ore. This is d angiotensin-converting enzyme by dissolving the metal in a suitable solvent, recovering the metal from the solution, and discarding the glom materials. The first step of extraction is leaching, in which the metal is dissolved in piddle or acid. Then the leach solution is purified by separating the waste from the desired materials. The final step is precipitating the metal, or one of its pure compounds from the leach solution by chemical or electrolytic means.
This lab is focused on determining whether an unfathomed try is chromite or non.
Chromite contains magnesium, iron, and chromium, and it must be determined if the sample contains each of these metals. In order to do that, each metal must be extracted separately. There are several grand concepts that need to be understood in order to pre miscellanea this lab successfully. First, some metals are amphoteric. Amphoterism is the ability of a stub to react with either acids or bases. Iron and magnesium form insoluble precipitates in basic solution and are not amphoteric, while zinc and chromium are amphoteric and form complex ions in the presence of excess base. Secondly, magnesium uncomplete absorbs nor emits energy in the 200-900nm region of the spectrum. Therefore, spectrophotometer techniques cannot be...If you want to get a full essay, order it on our website: Orderessay
If you want to get a full essay, wisit our page: write my essay .
No comments:
Post a Comment