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Problem- A strong-acid cation exchanger is employed to remove calcium hardness from water. Its wet-volume capacity is 2.0 eq/L in the sodium form. If calcium concentrations in the influent and effluent are 44 mg/L (2.2 meq/L) and 0.44 mg/L (0.22 meq/L), respectively find the maximum volume of water that can be treated per liter of resin. The water has the following composition in meq/L. The selective coefficient for calcium over sodium is 2.6. Ca2+ 2.2 meq/L Mg2+ 1.0 meq/L Na+ 3.0 meq/L HCO3- 2.9 meq/L Cl- 3.1 meq/L SO4-2 0.2 meq/L
Anyone can tell me how to solve it step by step so that I will be able to understand what is going on?
It is desired to produce an iron-carbon allow that has a minimum hardness of 200 HB and a minimum ductility of 35% RA. Is such an ally possible? If so what its composition and microstructure? If this is not possible explain why.
Question- Calculate the zero point energy of a vibrating nitrogen molecule, assuming that its force constant is 2294 N/m
what is the energy of the alpha particle that decays to the first excited state? You may neglect both relativistic effects and the recoil of the daughter
A student following the procedure described in this module collected the foll wing data: Mass Mg, m= 0.0243, initial syringe volume, ml=1.0, final syringe volume,ml= 26.5, barometric pressure, torr= 754, temperature,k= 298. Calculate the gas law c..
a piston has an external pressure of 10.0 atm. How much work has been done is the cylinder goes from a volume of 0.180 liters to 0.630 liters
Calculate the number of calories needed to increase the temperature of 50.0 g of copper metal from 21.0 degrees C to 75.0 degrees C. Given, the specific heat of copper is 0.382 cal/g x degrees C.
calculate the temperature (in EC) at which the vapor pressure is 760 torr. The vapor pressure of Ethanol is 115 torr at 34.9EC
Calculate the work of expansion of the gas in joules (1 J = 9.87 10-3 atm·L). Assume all the energy is used to do work.
The following set of reactions can be used to produce nitric acid, HNO3. Calculate the mass of nitric acid produced from the reaction of 15.5 kg of nitrogen gas with excess hydrogen gas. Each reaction in turn has an excess of the second reactant a..
Reaction kinetics - Determination of the activation energy of the reaction between oxalic acid and potassium permanganate.
carbon monoxide is a common pollutant in urban environments. on one particular day the air contains 5.5 mg of carbon
If you have three pyruvate molecules each labeled with 14C at different positions (one is labeled at the carboxyl, one at the carbonyl, and one at the methyl), feed them sequentially to pyruvate dehydrogenase and the citric acid cycle,
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