× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
L
4
d
4
3
k
3
k
3
j
3
k
3
b
3
f
3
b
3
d
3
h
3
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
jueee_ jueee_
wrote...
Posts: 21
Rep: 45 0
11 years ago
It's pH at NTP should be 9.0.
I have 0.2M ammonium chloride solution and 0.1M ammonia solution.
Kb(ammonia)= 2.0*10^-5

Do I really need all this information? I've tried solving it with the Henderson-Hasselbalch equation but I suppose I can't use it in the right way... Any help is appreciated!
Anyone..... ?
Read 485 times
1 Reply

Related Topics

Replies
wrote...
#1
11 years ago
pKb = 4.7
pOH = 14 - pH = 5

5 = 4.7 + log [NH4+]/ [NH3]

10^0.3 = 2 = [NH4+]/ [NH3]

the ratio between NH4+ and NH3 must be 2
0.2 / 0.1 = 2

so equal volumes of NH4Cl and NH3 must be used
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  998 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 280
  
 211
  
 143
Your Opinion
Who will win the 2024 president election?
Votes: 10
Closes: November 4
Previous poll results: How often do you eat-out per week?