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Throughout the separation process students frequently observe that their sodium hydroxide solution is colored due to hydrolysis of small quantities of acetaminophen by sodium hydroxide to form 4-aminophenol, which is oxidized to a highly colored compound. Define how the separation could allow traces of acetaminophen in the aspirin and caffeine solution. Explain the solubility of CH2Cl2 is acetaminophen 0.0005, aspirin 0.033 caffeine 0.089 g/mL.
considering the given reaction h2 g l2 g ltgt 2 hl g wherenbsp k 1.00 x 102 at a particular temperature in an
What is the density if carbon dioxide gas at -25.2° C and 98.0 kPa
When a 2.047-g sample that contains only carbon, hydrogen, and oxygen burns in excess O2, the products are 3.80 g CO2 and 1.04g H20. What is the empirical formula of this compound
3 moles of carbon dioxide gas expands reversibly in a piston-container from 20 L to 40 L in an isothermal process at 400 K. Calculate work, heat, change in internal energy and change in enthalpy, considering van der Waals behaviour. [a = 3.59 atm ..
Explain A particular 12V battery is based on a reaction having a standard cell potential, E0+1.92 V. Define what happens when the battery "dies"
An unknown acid has a molar mass of 60.05 g/mol. Given the following percent composition, what is the molecular formula. C-40 H-6.7 O-53.3
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
A 100 mL sample of .20 M HF is titrated with .10 M KOH. Determine the pH of the solution before the addition of any KOH. The Ka of HF is 3.5 * 10^-4
If 5.45mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram
A urine sample was found to have a pH of 5.83. What would be the ratio of the unprotonated form, A, to the protonated form, HA, for uric acid in this urine sample?
Two drops of 0.20 M imidazole solution were added to a solution containing ferrihemoglobin. The mass of the ferrihemoglobin solution was measured before the addition of the imidazole and the mass of the final solution was measured after adding the..
what is the formula used to determine the mass of KClO3 to form a saturated solution in 250g of water at 30 degrees celcius
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