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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
What is the effect of raising the temperature or increasing the carrier gas flow rate on the ability to resolve two closely
How much heat energy is evolved or absorbed 8kg of Ca(OH)2 reacts with a stoichiometric amount of CO2 Delta(H) = -69.8 kJ/mol
The total mass that can be lifted by a balloon is equal to the difference between the mass of gas in the balloon and the mass of air displaced by the balloon. How much mass could be lifted by the balloon stated above. What if the same balloon was ..
Problem- Use the van der waals equation and the ideal gas equation to calculate the volume of 1.000 ml mol of neon at a pressure of 500.0 atm and a temperature of 355.0 k. explain why the two values are different.
A solution is made by mixing 52.1 g of propyl chloride, C3H7Cl, and 38.4 g of propyl bromide, C3H7Br. What is the vapor pressure of propyl chloride in the solution at 25°C? The vapor pressure of pure propyl chloride is 347 torr at 25°C
The gas is heated to 520.0 K at a constant volume corresponding to the initial volume c) The gas undergoes a reversible isothermal expansion at 290.0 K until the pressure is half of its initial value
Define the enthalpy of vaporization for water is 40.65 kJmol21. As a design engineer for a project in a desert climate, you are exploring the option of using evaporative cooling. (a) If the air has an average volumetric heat capacity of 0.00130 J ..
What is the lead (II) ion concentration in a solution prepared by mixing 381 mL of 0.437 M lead (II) nitrate with 433 mL of 0.362 M sodium fluoride? The Ksp of lead (II) fluoride is 3.6 × 10^-8.
Determine E° for the reduction half-reaction Ce4+(aq) + e- → Ce3+(aq), given that the cell voltage for the following voltaic cell is E°cell = 1.887 V:
Calculate the minimum concentration of mg 2+ that must be added to .10 M NaF in order to initiate a precipitate of magnesium flouride. ( Ksp for MgF2= 6.9 x 10-9)
A sample containing 0.187 g Cl- is dissolved in 50.0 mL water.How many moles of Cl- ion are in the solution?What is the molarity of Cl- ion in the solution.
Compute the pH if NaOH solution of the 10.00 mL has been mixed. pKa of HCOOH = 3.74
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