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: Lithium salts are often much less soluble in water than the corresponding salts of other alkali…

A: When the amount of substance dissolved in a solution is maximum which is suppose x then that amount…

Q: How many kilograms of lead must be added to 71 kg of tin to yield a Pb-Sn alloy having a composition…

A: Mass of tin = 71 kg % lead = 29% %tin = 71%

Q: Account for the relative band gap energies of semiconductors interms of periodic trends?

A:

Q: Calcium metal is obtained by direct electrolysis of molten CaCl2. If a metallurgical electrolysis…

A: In CaCl2 we have Ca2+ metal ion  hence to convert it into Ca metal, the reaction occurring will be…

Q: What is Oxide Ceramics? Demonstrate the advantages and disadvantages of ceramic materials compared…

A: Oxide ceramics are inorganic compounds of metals like aluminium, zirconium, titanium etc. or of…

Q: Select the member of group 4A that best fits each description:(a) forms chains to the greatest…

A: A given element is said to be metallic in nature if it can lose electrons while it is non -metallic…

Q: The key reaction (unbalanced) in the manufacture of syn-thetic cryolite for aluminum electrolysis is…

A: The balanced chemical equation is as follows, The moles of Na3AlF6 is calculated from aluminium…

Q: Cite and explain three reasons why ferrous alloys are used so extensively.

A: Three reasons why ferrous alloys are used so extensively have to be explained below.

Q: Write the chemical formula for each of the following, andindicate the oxidation state of the halogen…

A: (A) calcium hypobromite- Ca(BrO)2, halogen- Br, oxidation state of Br is "+1" (B) bromic acid-…

Q: What are the possible reactions for the reaction of Aluminum with HCL and Water ? And what is the…

A: Aluminum reacts with HCl and water.We have to write the possible reactions and identify the…

Q: In some reactions, Be behaves like a typical alkaline earth metal; in others, it does not. Complete…

A: To find: Complete and balance the given equation and  Determination of reaction in which Be behave…

Q: Thortveitite is a mineral that contains the silicate ion [Si2O7]6-. The structure of this ion is…

A:

Q: Calcium metal is obtained by direct electrolysis of molten CaCl2. If a metallurgical electrolysis…

A:

Q: How many grams of rhodium (Rh) can be deposited on a ring used as a cathode by electrolysis of a…

A: Rh3+  + 3e-   -----> Rh Equivalent mass of Rh , E = M/n.f = 103/3 g/eq = 34.33 g/eq Z = E/F =…

Q: Calculate the composition, in weight percent, of an alloy that contains 105 kg of iron, 0.2 kg of…

A:

Q: What is the main element used in the manufacture of solar cells. Explain how additional elements are…

A: Silicon, the most common semiconductor material used in solar cells, representing approximately 95%…

Q: Elemental Li and Na are prepared by electrolysis of a molten salt, whereas K, Rb, and Cs are…

A: a) Aqueous salt solutions are mixtures of ions and water. When two half-reactions are possible at an…

Q: likely to be silicon doped with Antimony Sb?

A:

Q: what is the role of silica in the metallurgy of copper?

A: The most important ore of copper found on the earth is the copper-pyrite ore whose chemical formula…

Q: Describe the nature of electrical conduction in (a) germa- nium doped with indium and (b) cadmium…

A: (a) Germanium doped with indium: When germanium is doped with indium, it creates new levels at the…

Q: Write the formulas for the following compounds, andindicate the oxidation state of the group 4A…

A: (a) The formulas for Silicon dioxide is SiO2. The oxidation state of the group 4A element Si is -4.…

Q: A1. 17. The following are routinely added to zirconium oxide in order to improve mechanical and…

A: here all of the choice is correct . so option e is correct .

Q: Give explanations for the large drops in melting point fromC to Si and from Ge to Sn.

A: In the periodic table, the atomic size is decreases across left to right and up to down increases.…

Q: Consider the production of 100 kg of sodium metal using a current of 50,000 A, assuming a 100%…

A: (a) Given mass of Na metal (w) = 100 kg = 105 g Electric current (I) = 50,000 A Na+ + e- → Na(s)…

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: The production of high-grade iron from hematite and magnetite using a blast furnace involves several…

A: The production of high-grade iron from hematite and magnetite using a blast furnace involves several…

Q: Calculate the electric charge (in Coulombs) required to deposit 13.5 grams of Al from Al3+ ions.

A: Given,  Mass of Al = 13.5 g  Calculate electrical charge (in Coulombs) required to deposit 13.5 g of…

Q: Which of the following acids would be capable of reacting with a silicate (SiO2) mineral? A) HF B)…

A: silicon dioxide generally Known as silicate not easily reactive with acids in normal conditions but…

Q: Aluminum is produced commercially by the electrolysis of Al2 03 in the presence of a molten salt. If…

A: Given data :

Q: Give two gases required in the Haber process for the manufacture of ammonia.

A: As you have posted multiple independent questions, we will solve the first question for you. To get…

Q: 1. In an experiment, what volume of O, (g) at 0°C and 760 mmHg is produced when 5 A of current is…

A: Since your question has multiple parts, we will answer the first part for you. If you want residual…

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…

Q: Write the chemical formula for each of the following compounds, and indicate the oxidation state of…

A: Chemical formula of Sodium hypochlorite is NaClO  or  NaOCl . Oxidation state of Na = +1 Oxidation…

Q: Magnesium metal can be produced via the electrolysis of molten magnesium chloride harvested from…

A: a.) The molten MgCl2 contain two type of ions Mg2+ and Cl-. The magnesium ions undergo reduction to…

Q: What is the function of SiO2 in the metallurgy of copper?

A: Metallurgy is a process in which metals are separated from its ore.

Q: Describe the differences in the allotropes of white and red phosphorus. Explain why red phosphorus…

A: White phosphorous:White phosphorous is made up of P4Possesses complicated network of bonding.Must…

Q: The melting points of alkaline earth metals are many timeshigher than those of the alkali metals.…

A: Alkali metals The elements of group 1A are called alkali metals. They include Li, Na, K, Rb, Cs…

Q: Predict the volume of hydrogen generated at 1.00 atm and25°C by the reaction of 4.53 g scandium with…

A: Given that: pressure of hydrogen gas = 1.00 atm Temprature = 25°C  Mass of scandium =  4.53 g  To…

Q: aluminium is most abundant in earth crust yet it is obtained from bauxite. why?

A: Though Aluminum is the most abundant in earth crust it is obtained from bauxite. Bauxite (ore) is…

Q: Beryllia (BeO) ceramics have some use but show only poor resistance to strong acids and bases. Write…

A: The chemical equation for the reaction of BeO with a strong acid and with a strong base has to be…

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.