chem
posted by tomi .
A sample of 7.80L of NH3 (ammonia) gas at 22 degrees and 735mmHg is bubbled into a 0.350L solution of 0.400M HCL(hydrochloric acid).
The Kb value for NH3 is 1.8x105
Assuming all the NH3 dissolves and that the volume of the solution remains at 0.350L , calculate the pH of the resulting solution.

Use PV = nRT to determine the moles of NH3 at the conditions listed. Use the HendersonHasselbalch equation to find the pH. (I am assuming that not all of the NH3 is neutralized and that you will have a buffer solution of NH3 and NH4Cl but I didn't calculate it.) If that isn't the case, a different approach must be used.