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Nitrate ions present in industrial waste waters should be removed before discharge of the solutions. Uchida as well as Okuwaki [Hydrometallurgy, 49, 297-308 (1998)] have proposed that lead metal can serve as a appropriate reducing agent for nitrate ion:
NO3- + Pb = NO2- + PbO(s)
Get ready a log [N] vs. pe plot for NO3- and NO2- when [N]T = 10-3 M.
Given:
NO3- + 2H+ + 2e- = NO2- + H2O log K = 28.15
Calculate the effective radiation dosage (in Sieverts) for a 85-kg person who is exposed to 7.3 × 109 particles of alpha radiation. Assume that 85% of the radiation is absorbed
Calculate the percent ionization of nitrous acid in a solution that is 0.230 M in nitrous acid (HNO2) and 0.270 M in potassium nitrite (KNO2).
When a sample of molten MgCl2 and a sample of aqueous MgCl2 are electrolyzed with inert electrodes different products are obtained. Determine the product of the electrolysis of each sample and explain why there is a difference.
cs2g o2g co2g so2gconsider the unbalanced equation above. a 0.150 g sample of cs2 is reacted with 265 ml of o2 at
What would happen to the % Transmittance value if the wavelegth is changed from 447nm to 520 nm
Using the following thermochemical equation, determine the amount of heat produced per kg of CO2 formed during the combustion of benzene (C6H6). 2 C6H6(l) + 15 O2(g) ? 12 CO2(g) + 6 H2O(g) ?H°rxn = -6278 kJ
State an overall balanced equation for the reaction that takes place when aqueous nickel (ll) chloride reacts with zinc to make zinc chloride and nickel.
At 50 degrees celsius a sample of ammonia gas exerts a pressure of 6.5 atm. What is the pressure when the volume of the gas is reduced to 20% of the original value at the same temperature
Butane's (C4H10) molar enthalpy of vaporization is 22.44 kJ/mol and its normal boiling point is -0.40 °C. A 250-mL sealed Erlenmeyer flask contains 0.55 g of butane at -22 °C. a. What is the equilibrium vapor pressure under these conditions?
Mixtures of helium and oxygen are used for scuba diving. For a particular dive, 46 liters of O2 at 25 degrees celsius and 1.0 atm and 12 liters of He at 25 degrees celsius and 1.0 atm are pumped into a tank with a volume of 5.0 liters.
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid C6H5CO2H and 0.15 M sodium benzoate C6H5CO2Na. For benzoic acid, Ka = 6.5 x 10-5.
calculate deltas if 1 mol of liquid water is heated from 0.00degrees c to 10 degrees c under constant pressure if cpm
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