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Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks. The thermal process involves cooling the surface of a molten piece of glass more rapidly than the interior. The chemical process is accomplished by diffusing impurity cations into the near surface region. For soda glass, an impurity cation replaces a Na+ cation. Based on ionic radii and ionic charge, which of the following cations are good candidates for chemical tempering? Select as many as appropriate. Note: For Na+, rionic = 0.102 nm. 1. Al3+ (rionic = 0.053 nm) 2. Ba2+ (rionic = 0.136 nm) 3. Ca2+ (rionic = 0.100 nm) 4. Cs+ (rionic = 0.170 nm) 5. Fe2+ (rionic = 0.077 nm) 6. K+ (rionic = 0.138 nm) 7. Ti4+ (rionic = 0.061 nm)
Describe the major absorption bands in the IR spectrum - indicate the bonds responsible for those peaks which prove you have synthesized isopentyl acetate and that it is an ester.
The black silver sulfide discoloration of silverware can easily be removed by heating the silver article in a sodium carbonate solution in an aluminum pan.
What volume of .2 M Na2SO4 will completely react with 50 mL of .135 M Ba(NO3)2
Determine the mass of the hydrate and the mass of the sulfate after removing the water. 2. Calculate the number of moles of water and the number of the moles of the anhydrous sulfate
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 10.02 mL of 0.09352 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the reaction below an..
Specify whether a simple distillation or a fractional distillation would be more suitable for each of the following purifications, and briefly justify your choice.
The solution has a density of 1.286 g/cm3. Calculate E for the cell. Assume all the H+ ions come from the first dissociation of H2SO4, which is complete.
A 4.80 g nugget of pure gold absorbed 276 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C?
Calculate the pH of a solution prepared by dissolving 0.30 g of BaO in enough water to make 0.800 L of solution.
107X with abundance 54.34% and isotopic mass 106.9051 amu and 109X with isotopic mass 108.9048 amu. Use the given information to calculate the atomic mass of the element X to an accuracy of .001%
at constant volume, the initial pressure of a substance is 0.63 atm and the initial temperature is 283 k.calculate the pressure of the substance at 295 k.
Synthesis of a Liquid Crystal, experiment in which added 500 mg of cholesterol to 1.5 mL of dry pyridine. Then added 1.7 mmol of benzoyl chloride and heated the mixture.
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