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How much sodium carbonate (kg/day) is required to precipitate 60 mg/L of non-carbonate calcium in a water treatment plant processing 5 MGD.
Describe the effect of this on [CH3COOH] and [CH3COO-] (their concentrations). Account for your answer in terms of number of moles of protons transferred. Also, has the capacity of the buffer been exceeded? Explain.
Mercury is a toxic heavy metal which is liquid at room temperature. To form HgBr2, mercury(II) bromide, a student reacts elemental bromine with elemental mercury
Use the values from the table of reduction potentials on the last page to determine ?Gº and Keq for the reaction as listed below. Pb (s) + Sn2+ (aq) ? Pb2+ (aq) + Sn (s) ?Gº
The equilibrium constant for a reaction is 0.38 at 25 °C. What is the value of ?G° (kJ/mol) at this temperature
a particular first-order reaction has a rate constant of 1.35 times at 25degc. what is the magnitude of k at 95degc if
What volume of 0.250 M Na3PO4 is required to precipitate all the lead(II) ions from 140.0 mL of 0.750 M Pb(NO3)2
An airbag in?ates in less than 50 msec by the reaction of NaN3 to produce Na and nitrogen gas at 25 ?C. NaN3 → Na + N2 The volume of the airbag is about 30 liters, and it is ?lled to a pressure of 1.4 atm.
What are the molar enthalpy and total enthalpy of the pure system when 50% and 75% have been evaporated at: (i) 30°C, (ii) 50°C? Use liquid at 25°C as a reference state
A flask contains 0.250 mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask.
What must be the initial temperature of 22g of steam that is mixed with 90g of water at 68 degree celcius in an adiabatic calorimeter with a heat capacity of zero and that produces
Rank the following compounds in order of lowest to highest melting point. KCl CH3-O-CH3 CH3-CH2-CH3 CH3-CH2-NH2
By using photons of specific wavelengths, chemists can dissociate gaseous H-I to produce H atoms with accurately known speeds. When H-I dissociates, the H atoms move away rapidly, whereas the relatively heavy I atoms move little. Average Bond Ener..
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