Interpretation:
The reason as to why zone refining, used to make ultra-pure silicon, would not be a practical method of making ultra-pure carbon is to be stated.
Concept introduction:
Zone refining is a method that is used to form pure solid crystals of different substances. Zone-refining is based on the principle that impurities are more soluble in the molten state than in the solid state. The impure substance is placed on a heating belt which is moving continuously, a temperature gradient is maintained on the belt. The substance is melted on one side of the belt and gets cooled to solidify on the other side of the belt. The impurities remain in the molten state and a pure solid substance is obtained.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Bundle: Physical Chemistry, 2nd + Student Solutions Manual
- Three reactions very important to the semiconductor industry are The reduction of silicon dioxide to crude silicon, SiO2(s) + 2 C(s) → Si(s) + 2 CO(g) ΔrH° = 689.9 kJ/mol The formation of silicon tetrachloride from crude silicon, Si(s) + 2 Cl2(g) → SiCl4(g) ΔrH° = −657.01 kJ/mol The reduction of silicon tetrachloride to pure silicon with magnesium, SiCl4(g) + 2 Mg(s) → 2 MgCl2(s) + Si(s) ΔrH° = −625.6 kJ/mol Calculate the overall enthalpy change when 1.00 mol sand, SiO2, changes into very pure silicon by this series of reactions.arrow_forwardDescribe how ultrapure silicon can be produced from sand.arrow_forwardAluminum is produced commercially by the electrolysis of Al2O3 in the presence of a molten salt. If a plant has a continuous capacity of 1.00 million A, what mass of aluminum can be produced in 2.00 h?arrow_forward
- 4.48 Elemental phosphorous is used in the semiconductor industry. It can be obtained from an ore called fluoroapatite via reaction with SiO2 and C: 4Ca5( PO4)3F+18SiO2+30C3P4+30CO+18CaSiO3+2CaF2 Suppose a particular semiconductor production plant requires 1500 kg of P4. If the recovery of P4 from this reaction is 73% efficient, what mass of fluoroapatite is needed?arrow_forwardPhosphorous acid, H3PO3, is oxidized to phosphoric acid, H3PO4, by nitric acid, which is reduced to nitrogen monoxide, NO. Write the balanced equation for this reaction.arrow_forwardafter doing part a and b, please offer a simple explanation to why these two values might be different.arrow_forward
- name the ore of aluminium.arrow_forwardThe production of high-grade iron from hematite and magnetite using a blast furnace involves several reactions as described above. Write the balance step for each reaction. a. Reaction of carbon monoxide with hematite to produce iron (II, III) oxide and carbon dioxide. b. Reaction of carbon of monoxide with magnetite to produce ferrous oxide and carbon dioxide.arrow_forwardPlease answer question 21 part Aarrow_forward
- Name the chief ores of aluminium and zinc.arrow_forward60. Calculate the mass of aluminum metal that is needed to produce Cr metal from 5.00 × 10² g of chromite. Calculate how many grams of Cr metal are produced from 5.00 × 10² g of chromite.arrow_forward1000 kg of calcium phosphate is made to react with 10% excess silica, SiO2 and 90% excess carbon to produce 100 kg of phosphorous. The other products are calcium silicate and carbon dioxide. a) What is the degree of completion of the reaction?b) Illustrate the Law of Conservation of Mass.arrow_forward
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning