You have 1L of a solution which contains: 0.100M aqueous ammonia and 0.200M ammonium chloride. What is the pH if 0.02 moles of NaOH pellets are added? Kb for NH3 = 1.8 x 10-5 (I keep getting 9.69 an

asked by @selinaf1 • 10 months ago • Chemistry • 5 pts

d the answer should fall between 9.08 and 9.13 apparently)

Add comment
1 answer

Hey there! Here is the solution!

Notice that we have a buffer solution, and we are adding a strong base to it, so in the ICF chart we only care about those three species. Also, because we had only 1L solution, in order to find moles of the WB and WA you simply divide the Molarity by L. Once you react NaOH with the buffer, you use the Henderson Hasselbalch equation to find pH.

Let us know if you have more questions on this!

enter image description here

answered by @dashab2 • 9 months ago