Which Acids/Bases React with Water to Produce Non-Neutral Solutions?

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KCN, NaF, and NH4Br are identified as substances that react with water to produce non-neutral solutions due to their weak acid or base properties. KCN and NaF are conjugate bases of weak acids, which can establish equilibrium in water, leading to a non-neutral pH. In contrast, KBr and LiCl, being salts of strong acids, do not affect the pH significantly. The discussion emphasizes the importance of recognizing the strength of acids and bases when predicting the behavior of their salts in water. Understanding these concepts is crucial for determining the resulting pH of solutions.
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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.
 
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I agree with your logic...
 
Forgot I posted this! Thanks for your response. :)
 
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