Etching glass:
Industrially, hydrogen fluoride is acquired by heating fluorspar (CaF2) with concentrated H2SO4 within a lead vessel.
CaF2 + H2SO4 → CaSO4 + 2HF.HF distils over and vapors are condensed in water in the lead receiver. Aqueous HF therefore obtained is stored in wax bottles. It can’t be stored in glass or silica bottles as it attacks silica and silicates.Na2SiO3 + 6HF → Na2SiF6 + 3H2OSiO2 + 4HF → SiF4 + 2H2OThe act of hydrofluoric acid on silica and silicates is employed for etching glass. The glass article is initially covered with a film on wax. The design to be etched is now drawn on waxed surface and is then exposed to the act of hydrofluoric acid. Now the glass can be very quickly etched. The wax is at last washed off with turpentine.
Latest technology based Chemistry Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in P Block elements homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for P Block elements, project ideas and tutorials. We provide email based P Block elements homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in P Block elements. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Inorganic-Chemistry Homework Help and assignment help services. They use their experience, as they have solved thousands of the Chemistry assignments, which may help you to solve your complex issues of P Block elements. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Condensation Step-growth Polymerization Reactions tutorial all along with the key concepts of Condensation polymers, polyurethane, Dacron, condensation reaction
highly qualified tutors are available 24x7 with prominent finite automata assignment help service and help to fetch top grades.
www.tutorsglobe.com offers reactions of disubstituted rings homework help, reactions of disubstituted rings assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
Running Out of Time? Secure Last-Minute, High-Quality Health Care Ethics Assignment Help and Ace Your Scores!
Cleavage patterns in major groups of organisms tutorial all along with the key concepts of Blastula formationin sea urchin, Fate maps and the determination of sea urchin blastomeres, Axis specification, Cleavage in Early Amphibian Development, Cleavage in Fish Eggs, Cleavage in Mammal and Cleavage in Snail eggs
www.tutorsglobe.com offers sample assignments and homework help in operation research for solving problems under solving two-person and zero-sum game
tutorsglobe.com hepatitis a assignment help-homework help by online hepatitis viruses tutors
Interactions in an Ecosystem tutorial all along with the key concepts of Competition, Predation, Parasitism, Symbiosis, Commensalism and Saprophytism
tutorsglobe.com strain improvement assignment help-homework help by online industrial microbiology tutors
thermalisation tutorial all along with the key concepts of neutron moderation, laboratory frame, centre of mass frame, passage of beam of neutron through moderating material, average log energy decrement, slowing down power, neutron interaction, absorption
Theory and lecture notes of Sequences and Summation Notation all along with the key concepts of Defining a Sequence, Fibonacci Series, Factorials, Summation Notation and Properties of Summation. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Sequences and Summation Notation.
atomic spectra tutorial all along with the key concepts of definition of atomic spectra, line spectra of atoms, spectrum of atomic hydrogen
theory & concepts of network diagram representation, rules for drawing network diagram in cpm / pert, common errors in drawing networks, pert/cpm has the subsequent advantages.
this kind of outdoor antenna is made up of two pieces of aluminium poles. therefore this kind of antenna is termed dipole antenna.
the transformer is one of the very much reliable items of electrical equipment, requiring comparatively little attention; yet frequently even the minimum of attention is not provided, they as well occasionally breakdown due to neglect.
1943395
Questions Asked
3689
Tutors
1464608
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!