Which of the following is true about weak bases?
A. They have a low pH.
B. They are often anions of strong acids.
C. They do not react with water.
D. They completely dissociate in solution.
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I think C or D.
A strong acid and base are defined as dissociating completely in water.
A weak acid and base are defined as not fully dissociating in water.
Good to know acid and base properties are solvent dependent ( although you probably wont be tested on this fact).
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Also if you look at a strong Acid:
HNO3 -> H+ + -NO3
-NO3 is a weak base
Also note the stronger the acid the weaker the conjugate base
Also note the stronger the base the weaker the conjugate acid
You would call -NO3 a conjugate base of HNO3
The answer is not C because bronsted acid and bases react with water
Here if you want to read more up on this: