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a. You have 50 mL of a buffer solution that is 0.15 M in HA and 0.25 M in A-. Calculate the pH of the solution after you add 100 mL of 0.01 M HCl to the solution. The pKa of HA is 4.75.
b. You wish to prepare 100 mL of a buffer solution that is 0.025 M in carbonic acid (H2CO3). The pKa of H2CO3 is 6.351. Calculate the amount of H2CO3, in grams, that you will need to weigh out.
c. You wish to prepare 100 mL (total volume) of a buffer solution that is 0.025 M in carbonic acid, pH 7.25. You have solid H2CO3 and solid NaHCO3. Calculate how many grams of H2CO3 and HCO3- you need to weigh out to prepare this solution.pKa=6.351
If 40.00mL of 0.4445M I2 was added to a sample containing vitamin C, the unused I2, required 23.95mL of .197M S2O3^2- to react. How many moles of vitamin C were originally present?
acetaminophen the generic name for tylenoltm consists of carbon hydrogen nitrogen and oxygen atoms. a student in an
In the commercial manufacture of nitric acid, how many liters of nitrogen dioxide will produce 30 liters of nitric oxide given that both gases are at STP? 3NO2 + H2O-> 2HNO3 +NO
What effect would an increase in temperaure have on the experimentally determined Ksp of KHT?
Describe all the symmetry planes in the staggered conformation of ethane. Draw a figure and arrows to show any rotational symmetry axes in the staggered conformation of ethane.
A student weights out 1.000 g of iron (II) ammonium sulfate hexahydrate (MW = 392.14 g/mol). What is the minimum amount (in mL) of 1.00 M oxalic acid needed to react with all of the iron? Assume that the reaction goes to completion.
Draw the structure of the major small-base dehydrohalogenation product of 2-bromo-3-methylbutane
A student mixed 50.0 mL of 0.50 M H2SO4 (aq) at 18.5 degrees C with 100 mL of 0.50 M NaOH (aq) at the same temperature. After the reaction was completed, the temperature rose to 22.0 degrees C. What was the heat of reaction? (Assuming the densitie..
What is the expected freezing point of a solution of 110.5 g of H2SO4 in 225 g of water? Assume sulfuric acid completely dissociates in water.
A gaseous mixture containing 0.200 mol fraction of carbon tetrachloride (CCl4) and 0.800 mol fraction of dry air is initially at 68.0°C and 1169 mmHg. 1- If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first sta..
The solubility of O2 in water is 6.5 mg/L at an atmospheric pressure of 1.0 atm and temperature of 40 degrees C. Calculate the Henry's Law constant of O2 at 40 degree C. The mole fraction of O2 in air is .209
The solubility of lead (II) sulfate is 4.0x10^-2 g/L. What is the solubility product constant for lead (II) sulfate?
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