• Support PF! Buy your school textbooks, materials and every day products Here!

Acid/Base Chemistry

  • Thread starter SA32
  • Start date
  • #1
32
0

Homework Statement


Which of the substanced KCN, NaF, KBr, LiCl, and NH4Br will react with water to produce non-neutral solutions?
a.) KCN, LiCl and NH4Br
b.) KCN, NaF and NH4Br
c.) NaF, LiCl and NH4Br
d.) NaF, KBr and NH4Br
e.) KCN, KBr and LiCl


Homework Equations




The Attempt at a Solution


Okay, so I ruled out e because NH4+ is a weak acid and should produce a non-neutral solution in water. The rest all appear to be conjugate bases of acids, but I'm having trouble deciding which ones will result in a non-neutral pH.

So... I guess I've been given the conjugate bases of two weak acids (HCN and HF) and the conjugate bases of two strong acids (HBr and HCl) I'm thinking... since HBr and HCl are strong acids, the Cl- and Br- in LiCl and KBr added to water aren't going to do much. Whereas maybe the F- in NaF and CN- in KCN would set up an equilibrium in water? So I guess I'm thinking b, but I'm really not sure. Any help is appreciated.
 

Answers and Replies

  • #2
chemisttree
Science Advisor
Homework Helper
Gold Member
3,289
298
I agree with your logic...
 
  • #3
32
0
Forgot I posted this! Thanks for your response. :)
 

Related Threads on Acid/Base Chemistry

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
12
Views
15K
Replies
2
Views
5K
  • Last Post
Replies
6
Views
5K
Top