Why do fluoride salts give basic solutions in water?
2 Answers
Because
Explanation:
We interrogate the equilibrium:
Consider the basicity of the counterion,
For both salts we examine the solubility product:
While I have few data available, the fluoride salt is soluble to the extent of
Both
If you decrease the
#"BaF"_2(s) rightleftharpoons "Ba"^(2+)(aq) + 2"F"^(-)(aq)# with
#K_(sp) = ["Ba"^(2+)]["F"^(-)]^2 ~~ 3.04 xx 10^(-6)# (the#K_(sp)# was derived from the#"g/100 mL"# solubility on Wikipedia).
But
#"F"^(-)(aq) + "H"^(+)(aq) rightleftharpoons "HF"(aq)# with
#K_c = (["HF"])/(["H"^(+)]["F"^(-)])# .
Thus, if the
As a result, by Le Chatelier's principle,
The same cannot be said about