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A sample may contain any or all of the following ions: Hg2 2, Ba2, and Mn2.
a. No precipitate formed when an aqueous solution of NaCl was added to the sample solution.
b. No precipitate formed when an aqueous solution of Na2SO4 was added to the sample solution
c. A precipitate formed when the sample solution was made basic with NaOH.
Which ion or ions are present in the sample solution?
In the batch preparation of an aqueous solution, the water is first heated to 80 °C in a jacketed, agitated vessel; 1000 Imp. gal. (4545 kg) is heated from 15 °C.
HEAT TRANSFER PROBLEM NO18 - The configuration of a furnace can be approximate as an equilibrium triangular duct which is usually long enough so that the end effects are negligible , the hot wall is maintained at 900 k and has an emissivity e1 = 0..
At each of the speeds obtained in part (a), determine the maximum value of the average torque an d the maximum mechanical power output.
The above stream is flashed isothermally to a pressure such that the vapor contains 90% carbon dioxide. Determine the pressure and the concentration of CO2 in the liquid.
Natural gas is widely used as fuel in the process industries, so the price of natural gas is often an important variable in economic analysis. Develop a 15-year forecast of U.S. natural gas prices. Historic natural gas prices are available at www...
Calculate the maximum allowable particle size as a function of the bulk glucose concentrations of 5 g/ l and 50 g /l. For medium containing 30 g /l glucose, calculate Rmax at cell loading of 5 and 30 wt%.
Why does Al as (Al sheet) react with HCl and Al as (Al foil) not react with HCl? and why do they both not react with a weak acid?and why does steel neither react with a weak nor a strong acid?
1 when a thermocouple is moved from one medium to another medium at a different temperature the thermocouple must be
Balanced wye-connected loads drawing 10 kW at 0.8 power factor lagging and 15 kW at 0.9 power factor leading are connected in parallel and supplied by a 60-Hz, 300-V, three-phase system.
12. Comparing emitted Auger electrons (AES, Auger electron spectroscopy) with X-rays (EDX / EDS, energy-dispersive X-ray spectroscopy), what is the difference in the analysed sample volume (i.e. volume of the sample from which the signal comes)?
What number of acidic hydrogens per molecule does citric acid have?
For the following cases: How much energy is lost every day when the steam temperature is maintained at 200oC, and the surrounding average air temperature is 20.0oC, and the surroundings average air temperature is 20.0oC? Neglect losses though the end..
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