How do pH and Kf affect the end point of an EDTA titration?
In: Chemistry
What is the net ionic equation of NaCl+Ag2SO4 ---> Na2SO4+AgCl
In: Chemistry
Consider the titration of 40.0 mL of 0.0600 M
(CH3)2NH (a weak base; Kb =
0.000540) with 0.100 M HClO4. Calculate the pH after the
following volumes of titrant have been added:
| (a) 0.0 mL pH = |
(b) 6.0 mL pH = |
(c) 12.0 mL pH = |
| (d) 18.0 mL pH = |
(e) 24.0 mL pH = |
(f) 26.4 mL pH = |
In: Chemistry
MODULE 5: ASSIGNMENT ENVM 590: AIR POLLUTION CONTROL. Module 5: Particulate Control 1. For a given dust loading initially and two identical collectors in series, why is the overall collection efficiency for the second usually less than that of the first collector? 2. An industrial furnace burns No. 4 residual oil with a heating value of 135,000 Btu/gal. Based on the emission factors given in Table 5-4, is a particulate collector required to meet a state emission standard of 0.10 lb/106 Btu? 3. Two particulate collectors are in series. The fractional efficiency for size dp in the upstream device is 80 percent, and for the downstream device the efficiency is 60 percent. Find the overall removal efficiency for size dp. 4. What is the required minimum efficiency of an electrostatic precipitator used as the second collector, when it is preceded by a cyclone separator having an efficiency of 80% if the desired overall efficiency is 98 %? 5. A spreader stoker is used to burn coal containing 8 per cent ash. The flue gas from burning 1 lb of coal is 170 ft3. What is the maximum dust loading of PM in combustion gas in grains per cubic foot?
In: Chemistry
Calculate the pH in 0.050 M sodium benzoate; Ka for benzoic acid (C6H5CO2H) is 6.5×10−5.
In: Chemistry
2) Indicate the structural change and reaction that occurred to produce each positive test a. Bromine Unsatuation b. Baeyer Unsaturation c. Chromic Acid d. Tollen’s e. Iodoform
In: Chemistry
Einstein did not try to reconcile the wave and particle theories of light, and did not say much about their apparent inconsistency. Einstein basically visualized a beam of light as a stream of bullets coming from a machine gun. In the photoelectric effect, a photon
In: Chemistry
1. Provide a scenerio in which a molecule with two strong bond dipoles can have no molecular dipole at all? Explain your answer with a drawing showing individual bond dipoles and the overall molecular dipole.
2. Provide a scenerio in which a molecule may have a very large molecular dipole. Explain your answer with a drawing showing individual bond dipoles and the overall molecular dipole
In: Chemistry
HClO is a weak acid (Ka = 4.0 × 10–8) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.026 M in NaClO at 25 °C?
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You run an ion exchange column, eluting your protein with a high NaCl buffer. Would you be able to run a size exclusion column immediately after the IEX column or would you have to dialyze your sample to change the buffer first?
In: Chemistry
1. A 15.00 gram sample of ammonium chloride was dissolved in 100.00 grams of water. How much heat is produced by the dissolution (absorbed from the solution) if the solution temperature goes from 22.0 *C to 1.0 *C. The specific heat of the solution is 4.18 J/g*C
2. 300.0 mL of a 2.500 M Solution X was mixed with 300.0 mL of a 2.500 M Solution Y in a calorimeter. Both of the solutions were at the same temperature initially. Determine the heat of neutralization (kj/mole) if the temperature goes from 12.0 *C to 29.0 *C. Assume a molar ratio of 1:1. The specific heat of the solution is 4.281 J/ g*C. The density of the mixture is 1.050 g/mL.
3. Sketch a crude time-temperature graph for an endothermic reaction
4. Why, on an exothermic time-temperature graph, does the temperature eventually fall?
In: Chemistry
In polymer chemistry, Suppose we have two polypropylene samples. One is atactic and one is isotactic.
a) Explain the microstructural difference between the two;
b) Would you expect the atactic sample to be stronger, weaker, or the same strength as the isotactic sample? Explain.
In: Chemistry
NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.040 M in NH4Cl at 25 °C?
In: Chemistry
An electrochemical battery is used to provide 1 milliwatt (mW) of power for a (small) light. The chemical reaction in the battery is: 1/2 N2 (g) + 3/2 H2 (g) → NH3 (g)
a. What is the free-energy change for the reaction at 25o C, 1 bar?
b. Calculate the free-energy change for the reaction at 50o C, 1 bar. State any assumptions made for this calculation.
c. The limiting reactant in the battery is 100 g of H2. Calculate the maximum length of time (seconds) the light can operate at 25o C
In: Chemistry
Use the data from the most concentrated solution of acetic acid to calculate the Ka value for acetic acid. Clearly show all of your work below. mot concentrated solution of acetic acid is 0.116m..ph = 2.85
In: Chemistry