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Calculate the ratio of ethyl amine (CH3CH2NH2) to the ethyl ammonium ion (CH3CH2NH3+) in a solution with a pH of 11.0. pKa for CH3CH2NH3+ = 10.636.
A buffer solution was prepared by mixing 50.0 mL of a 0.100 M solution of CH3COOH with 0.500 grams of NaCH3COO. The resulting mixture is diluted to 100.0 mL. What is the pH of the solution? Ka for acetic acid is 1.75 x 10-5.
How many grams of NaCH3COO must be added to 150.0 mL of a 0.150 M solution of CH3COOH to produce a buffer of pH 4.75? Assume that the volume will remain constant, pKa for CH3COOH = 4.757
A buffer solution was prepared by dissolving 5.00 grams of sodium propanate (NaCH3CH2CO2) in a solution containing 0.100 moles of propanoic acid (CH3CH2CO2H) and diluting the mixture to 500.0 mL. To this solution was added 5.00 mL of 1.00 M HCl. Calculate the pH of the resulting solution. pKa for propanoic acid is 4.874.
A beaker containing 500.0 mL was determined to contain 0.150 M ammonia (NH3) and 0.150 M ammonium chloride NH4Cl. To this solution was added 50.0 mL of 0.15 M HCl. What was the change in pH of the ammonia-ammonium ion solution? pKa for NH4+ = 9.244.
What weight of sodium lactate (CH3CHOHCOONa; MW = 112.05) must be added to 500 mL of 0.200 M lactic acid (CH3CHOHCOOH, MW= 90.07; Ka = 1.4 x 10-4) in order to produce a buffered solution with a pH = 4.50?
what effect does the presence of sodium sulfite group on methy orange have on the solubility of methyl orange in water. If this group were absent, would you expect the solubility of the resulting molecule to be more or less soluble in hexane than ..
Find the enthalpy change for the chemical reaction below PCl5(g) ----> PCl3 (g) +Cl2 From the following equations:
Explain why light intensity is dependent on the distance the detector is from the light source. Describe the mathematical relationship. Explain why all comparative measurments for this experiment should be made with the optical cable the same dist..
A three component solution is made by adding 0.300 moles of CH3CN and 0.400 moles of C3H6O to 0.350 moles of CS2. The mixture behaves as an ideal mixture. What is the vapor pressure of the solution?
The fuel used in many disposable lighters is liquid butane,C4H10 . How many carbon atoms are in 1.50g of butane
if equal concentrations of acrylonitrile c 3h 3n and methyl methacrylate c5h8o2 were each polymerized at temperature
Which of the water samples that you tested had the highest calcium concentration. does this correlate with the total dissolved solids results you obtained
Some water dissolves in liquid methane at -161 degrees C, the boiling point of liquid methane, to give a solution in which the mole fraction of water is 6*10^-5. Determine the mass of water (in units of grams) dissolved in 115L of this solution if..
It takes 12.0 minutes for 1.00 L of N2 (g) to diffuse through a pin hole. Suppose it takes 30.0 minutes for 2.00 L of gas X to diffuse through the same hole under the same condition, what is the molar mass of gas X
The following cell was used for the determination of pCrO4. SCE||CrO4(xM), AgCrO4|Ag. Calculate pCrO4 if the cell potential is -.386V
You need 1.00 L of .125M sulfuric acid solution. Describe how you would prepare this solution from a supply of 6.00 M H2SO4 solution, distilled water, and a 1-L volumetric flask.
For example a diene is reacting with HBr producing a 1, 2 and a 1, 4 product. Under kinetic conditions which one is the major product and why. Under thermodynamic conditions which one is the most important product and why
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