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1. a .1276 g sample of a monprotic acid, molar mass 1.10 x 10^2, was dissolved in 25 mL of water and titrated with .0633 M NaOH. After 10 mL if base had been added the pH was determined to be 5.27. What is the Ka for the acid?
2. calculate the ph at the equivilance point for the following titration: .20 M HCl versus .20 M methylamine. Ka of methylammonium is 2.3 x 10^-11
3. 30 mL if .10 M Ba(NO3)2 is added to 10 mL of .10 M Na2CO3 and resulting concentration in solution of Ba is .075 M CO3 is .025 M. What is the value of the reaction quotient?
The volume of KHC2O4 solution required to reach equivalence is 26.7 mL. What is the concentration of the original KOH solution. What specific observation identifies the endpoint of the titration
if 1 mole of a van der waals gas for which it might be shown that nbspspread out is o thermally from a volume of two
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane. The equilibrium constant for this reaction at 28 degrees Celsius is 2,900. Estimate the equilibrium constant at 38 degrees C.
Acetone, like dimethyl ether, has no self-hydrogen bonding capacity, but its dipole moemnt is more than double that of the ether. Can this high dipole moment explain the properties of acetone compared to the other compounds
What will be the final temperature of a 3.5 kg block of aluminium (initial temperature = 22oC) after the addition of 2.9 kJ of energy. Specific heat of aluminium
A 2.007 g sample of a hydrocarbon is combusted to give 1.389 g of H2O and 6.785 g of CO2. What is the empirical formula of the compound
a 4.75 g sample of aluminum pellets specific heat capacity 0.89 j degc-1 g-1 and a 10.00 g sample of iron pellets
The solution to Chemistry, Are there differences between having electron-donating groups and electron-withdrawing groups
In a gas mixture, the partial pressures are argon 455 , neon 85 , and nitrogen 135 .What is the total pressure exerted by the gas mixture?
We wish to prepare a buffer of pH 10 using common laboratory reagents. How many mL of 6M HCl would we have to add to a solution prepared by adding 100 mL of 15M NH3 to 200 mL of water?
A compound contains only carbon and nitrogen and is 46.2% carbon by mass. A gaseous sample of the compound has a density of 2.05 g/L at 927 torr and 105 °C
Calculate the theoretical amount of 2.5 M NaOH (10%) solution needed to convert the benzoic acid to its water-soluble salt. Is the combined volume of NaOH used in the extractions sufficient for complete deprotonation of benzoic acid
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