What are the concentrations of all species in a 0.13 M KF solution?

For K+, F-, HF, OH-, and H3O+ I got 0.13, 0.13, 1.4e-6, 1.4e-6, 7.0e-9 respectively but they were wrong.

1 Answer
anor277
Apr 5, 2018

You need to account for the basicity of the fluoride ion.

Explanation:

In aqueous solution, fluoride anion causes water hydrolysis according to the given equation:

#F^(-) + H_2O rightleftharpoons HF(aq) + HO^(-)#

As a result all fluoride salts are slightly basic. If we gots thermodynamic data we can solve the equilibrium for a given starting concentration of #HF#. But we must have those data to calculate this equilibrium.

Related questions
Impact of this question
5959 views around the world
You can reuse this answer
Creative Commons License