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A buffer is prepared by mixing 500 ml of 0.4 M Na2HPO4 with 500 ml of 0.2 M NaH2PO4. what is the pH of this buffer? What would be the final pH if you added the same quantity of acid to 1 litre of H2O (pH 7)?
For the following reaction at 298.2 K, 2 CO(g) + O2(g) ---> 2 CO2(g) calculate deltaS(universe) given deltaS(system) = -173.1 J/K and deltaH?(system) = -566.0 kJ.
the electron in the n 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. to what energy level
the voltage developed by a cell consisting of Tl metal dipping in an aqueous solution that is 0.54 M in Tl+, connected by a porous bridge to a 0.64 M aqueous solution of HCl in contact with a Pt electrode over which H2 gas is bubbling at p = 0.72 ..
If the pressure of oxygen is 140 mmHg on inhaled air, and the pressure of oxygen is 40 mmHg o the "veinous blood" in the lungs, what happens to the oxygen and why
A) Calculate the molar solubility of Ni(OH)2 when buffered at pH=8.0 B) Calculate the molar solubility of Ni(OH)2 when buffered at pH=10.0 C)
Elements, which has the largest first ionization energy and equation correctly represents the first ionization of calcium?
The density of water at room temperature is 0.9970g cm^-3. How many lbs does the water in a full 5.00 gal weigh
Chemistry Questions on Calculate P H
Methyl Orange is an acid-base indicator. In dilute solution, at pH greater than 4.4, it is yellow. At pH=3.2 the solution appears red. Draw a structure of the species that is formed at the lower pH of the acid proton adds to the azo nitrogen atom ..
an ideal gas is expand at a constant temperature with the pressure changing from 10 bar to 1 bar. assume Cp,m = 5/2R calculate delta U, delta H, delta S
use your titration results to calculate the molar concentration (molarity) of the Ba(OH)2 solution using the molar amounts of H2SO4 used in each trial
The reaction is first order in SO2Cl2 and the rate constant is 3.0 × 10^-6 s-1at 600 K. A vessel is charged with 2.4 atm of at 600 K. The partial pressure of SO2 Cl2 at 3.0 x 10 ^5 is __________ atm.
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