a solution is made from 0.23 M CH3NH2 (a weak base) and 0.24 M CH3NH3Cl. what is the pH of the solution if the Kb for CH3NH2 is 4.4x10^-4?

An analytical chemist is titrating 169.4 mL of a 1.000M solution of butanoic acid (HC3H,CO₂) with a 1.100M solution of KOH. The pK of butanoic acid is 4.82. Calculate the pH of the acid solution after the chemist has added 183.1 mL of the KOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of KOH solution added. Round your answer to 2 decimal places. pH = ☑

An analytical chemist is titrating 146.0 mL of a 1.200 M solution of benzoic acid (HC6H5CO₂) with a 0.6900 M solution of NaOH. The pK of benzoic acid is 4.20. Calculate the pH of the acid solution after the chemist has added 46.25 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places. pH = 0 ×

What is the approximate pH at the equivalence point of a weak base-strong acid titration if 50.00 mL of aqueous ammonia (NH3) requires 37.10 mL of 0.1087 mol L-1 HCI? pK₁ =4.75 for ammonia. Report your answer in 2 decimal places.

If a buffer solution is 0.110 M in a weak base (?b= 7.2×10^−5) and 0.460 M in its conjugate acid, what is the pH?

The pH of blood plasma is 7.40. Assuming that the principal buffer system in blood is HCO, /H2CO3, A) determine the ratio [HCO,]/[H2CO3] in blood plasma. The ionization con- stant of carbonic acid is K.(H2CO3) = 4.3 x 10-7. B) Based on your result in part (A), how many moles of H2CO3 (assuming that they occupy no volume) would need to be added to 300.0 mL of an aqueous solution that is 0.250 mol L- in NaHCO3 to make a buffer solution of the same pH as blood plasma? To solve the problem you may assume that the solutions behave as ideal dilute solutions (solute-type activity coefficients equal to unity).

What is the pH of a buffer solution that is 0.20 M methyl amine, CH3NH2 and 0.18 M methylammonium chloride CH3NH2Cl? The Kb for CH3NH2 is 4.4x10-4. You do not need to solve the quadratic equation for this problem. Express your answer to two decimal places.

Calculate the pH of a 0.2 M solution of NH2OH                        2. Calculate the pH of a buffer solution that is 0.12 M lactic acid (HC3H5O3) and 0.1 M       sodium lactate (NaC3H5O3).  Ka for lactic acid = 1.4 X10-4                       3. Calculate the pH of a buffer solution obtained by dissolving 0.1 moles of pyridine (C5H5N) and 0.2 moles of pyridinium chloride (C5H5NHCl).

8. You will perform some calculations to see the difference between a pH buffer solution and a weak acid solution of the same pH when a small amount of strong base is added. Chlorous acid, HClO2, is a moderately strong acid with a Ka 1.110×10-². Please answer the following questions. A. = B. What is the molarity of the HClO2 solution whose pH is 2.38? M Please provider your answer below. 3.76E-5 Check answer A 仁 To prepare a buffer solution of the same pH, what is the molarity of the NaClO₂ if the molarity of the HClO2 is 0.6013 M? M Please provider your answer below. 0.₂ Check answer → $ $

You have 1.5 liter of solution that is composed of 8.88 grams of NH3 and 11.33 grams of ammonium chloride mixed well. Kb for ammonia =1.8 x 10^-5 (A) is this a buffer solution? Why or why not? (B)if it is a buffer solution, what is the pH of this buffer solution? (C)how many mL of 1.50 M HCl can be added to this solution before the buffer is exhausted (d) how many mL of 1.5 M NaOH can be added to this solution before the buffer is exhausted?