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Glass is a notorious source of metal ion contamination. Three glassbottles were crushed and sieved to collect 1-mm pieces. To see howmuch Al3+ could be extracted, 200mL of a 0.05 Msolution of the metal-binding compound EDTA was stirred with 0.50 gof ~1-mm glass particles in a polyethylene flask. The Al content ofthe solution after 2 months was 5.2µM. The total Al content ofthe glass, measured after completely dissolving some glass in 48wt% HF with microwave heating, was 0.80 wt%. What fraction of theAl was extracted from the glass by EDTA?
compressed reversibly and adiabatically until the temperature reaches 250K. Given that its molar constant-volume heat capacity is 27.5J/Kmol, calculate final pressure and final volume.
The product of the complete hydrolysis contained 1.3 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the amino groups of other amino acids could be found. How may popypeptides are in this protein
Sketch a series of titration curves for the titration of a strong acid with a strong base where the concentration of the acid is 10-1, 10-2, and 10-3 mol dm-3 respectively. Explain why the choice of indicators is restricted at different acid conce..
Calculate the solubility of AgSCN in a 0.03333 M solution of Mg(ClO4) 2 using activities and concentrations
The sulfur is converted first to SO2, which reacts with oxygen and atmospheric moisture to produce sulfuric acid, H2SO4. If a particular coal contains 0.95% sulfur (by mass), calculate the mass of sulfuric acid produced by burning a metric ton (10..
How would benzephenone move on a TLC compared to an alcohol? and WHY do they move differently.
What is the mass percent of MgO in the mixture? Assume that only the MgO reacts with CO2.
Explain, in detail, why a bromine radical is more selective than a chlorine radical during abstraction of a hydrogen on a hydrocarbon?
What product or products would you expect to obtain by the addition of bromine to cis-cinnamic acid, assuming that it reacts by the same mechanism as the trans acid
The combustion of pentane with oxygen is a well known process. Write a balanced equation for the reaction of pentane, C5H12, with oxygen, O2, forming the products carbon dioxide, CO2, and water, H2O. What mass of carbon dioxide will be produced by..
sample of benzoic acid is burned in a bomb calorimeter at 25 degrees C, and the temperature increases by 3.72 degrees C. What is the calorimeter constant?
NaOH is added to 625 mL of 0.250 M weak acid (Ka = 5.62 × 10-5). What is the pH of the resulting buffer?
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