Semiconductors made from elements in Groups 3A(13)and 5A(15) are typically prepared by direct reaction of the ele-ments at high temperature. An engineer treats 32.5 g of moltengallium with 20.4 L of white phosphorus vapor at 515 K and195 kPa. If purification losses are 7.2% by mass, how manygrams of gallium phosphide will be prepared?

Q: A 6.7 g impure sample of Aluminum is to be analyzed by reaction with acid. a. Would H2SO4 be able…

A: Given : Mass of aluminium sample = 6.7 g

Q: An element forms an oxide, E₂O₃, and a fluoride, EF₃.(a) Of which two groups might E be a member?(b)…

A: a. (a) When element E form oxide E2O3 then oxidation state of E is +3. When it forms fluoride EF3…

Q: Discuss the Following: Why although a non-metal, graphite is often used as an electrode material?…

A: Doping is the process of addition of metal that causes enhancement in conducting properties of the…

Q: Directions: Balance the following chemical equation: 1. FeS + O2 → FeO3 + SO2

A: Given,   FeS + O2  → FeO3  + SO2  The balanced equation is:

Q: Using balanced chemical equations suggest the synthesis of sodium tetraboroaluminate from H2, Na,…

A: Sodium tetraboroaluminate, also known as sodium aluminate tetraborate or Na2[B4O5(OH)4]·8H2O, is a…

Q: Write a balanced chemical reaction for the reaction of S2O32- ions with bromine to give bromide and…

A:

Q: Why is it important to know the reactions of alkali and alkaline metals in metallurgical processes?

A: Alkali metals are group 1 elements like potassium, sodium, Lithium, cesium, rubidium etc. Alkaline…

Q: >Describe how red and black phosphorus are made from white phosphorus.

A: Preparation of red phosphorous is as follows,Generally, white phosphorus is unstable hence it…

Q: Some of the water on earth was formed by the interaction ofiron and silicon oxides and methane.…

A: When chemical substances combine such that their ionic or molecular structures change to generate…

Q: Why is vanadium present in oil from some sources?

A: Vanadium is an element having atomic number 23. The atomic symbol of vanadium is V. It is a…

Refining of Crude Metal

Metallurgy could be defined as a technique by which metals can be extracted in their pure nature. Extractive metallurgy directs with the route of eradicating the valuable metals from ores and purifying the extracted metals to pure nature. In hydrometallurgy, the metal extraction’s from their ores is done using an aqueous solution. In the pyrometallurgical process, high temperatures are employed to initiate the reactions between gases, molten metals, and solids. In electrometallurgy, the technique is carried in an electrolytic cell.