Using ammonium citrate (Ka = 4.06×10^−7, 2.00 M) as a weak acid and sodium citrate dihydrate as the conjugate base, prepare a buffer solution with a pH of 6.50. The final volume of buffer solution must be 100.00 mL and the final concentration of the weak acid must be 0.100 M. What mass of solid conjugate base should be added to make the buffer solution with a pH of 6.50? What volume of acid should be added to make the buffer?

An analytical chemist is titrating 137.2 mL of a 0.2100M solution of butanoic acid (HC3H,CO2) with a 0.5300 M solution of KOH. The pK of butanoic acid is 4.82. Calculate the pH of the acid solution after the chemist has added 28.68 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 == 11 G

A 1.30 L buffer solution consists of 0.313 M propanoic acid and 0.190 M sodium propanoate. Calculate the pH of the solution following the addition of 0.069 mol HCl. Assume that any contribution of the HCl to the volume of the solution is negligible. The K₂ of propanoic acid is 1.34 × 10-5. pH =

How many grams of dry NH4Cl need to be added to 1.80 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.53? Kb for ammonia is 1.8×10−5. Express your answer with the appropriate units.

An analytical chemist is titrating 240.2 mL of a 1.000M solution of acetic acid (HCH,CO, with a 0.2300M solution of KOH. The p K, of acetic acid is 4.70. Calculate the pH of the acid solution after the chemist has added 306.7 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 =|

A 1.32 L1.32 L buffer solution consists of 0.303 M0.303 M propanoic acid, C2H5COOH and 0.193 M0.193 M sodium propanoate, C2H5COONa. Calculate the pH of the solution after the addition of 0.071 mol HCl0.071 mol HCl. The ?a�a of propanoic acid is 1.34×10−51.34×10−5.

What is the pH of a buffer that is 0.160 M in a weak acid and 0.217 M in the acid's conjugate base? The acid's ionization constant is 5.7×10-4