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A plant manufacturing nails and screws uses a large pool (volume = 10,000 L) to collect and treat its residual waste water before discharging it in a nearby stream. The manufacturing process makes use of a strong acid (HCl) and a weaker one (phosphoric acid, H3PO4; pKa1 = 2.148, pKa2 = 7.20, pKa3 = 12.15), before discharging them in the pool for treatment (neutralization). Once the pool is filled to its maximum capacity, a technician measures the chlorine and phosphorus concentrations in the waste water to be 0.5 M and 1.0 M, respectively. Assume (i) that chlorine and phosphorus come only from HCl and phosphoric acid, respectively, and (ii) that no H+ was consumed (or neutralized) in the manufacturing process.
(a) Knowing that the technician has to bring the pH of the waste water back to a minimum of 7.2 before discharging it in the stream, what is the minimum amount (in kg) of NaOH(s) (40 g/mol) that he has to add to the pool before discharging the waste water in the stream?
blood alcohol content of an individuals is 0.15. if we suppose the individual drank all of the alcohol at the total
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A 97.0 mL sample of 0.0200 M HCl is titrated with 0.0400 M RbOH solution. Calculate the pH after the following volumes of base have been added. (a) 22.3 mL pH = (b) 47.5 mL pH = (c) 48.5 mL pH = (d) 49.5 mL pH = (e) 94.1 mL pH =
the rate of the constants for the above gas pharse reaction is 1.438M^-2 s^-1 at exactly 642.5 Kelvin and 21.64 M^-1 s^-1 at exactly 838.1 Kelvin. What is the value of the activation energy of the reaction in KJ/mole?
Clancy consume in order to lower the activity of his ADH on methanol to 5% of it's normal value if the Km values of canine ADH for ethanol and methanol
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Why can K2CO3 convert acetaminophen to phenacetin, when K2CO3 is a weak base. Williamson ether synthesis for aliphatic molecules usually requires a strong base, such as sodium ethoxide.
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