CaF2 - Acidic or Basic

Resolved Question

Is CaF2 (calcium fluoride) acidic or basic? Is Ca(OH)2 a strong or weak base?

So I learned to look at where each ion came from.
Ex: NaCl is a neutral salt because NaOH is a strong base and HCl is a strong acid.
If you have NaF, this is slightly basic since NaOH is a strong base and F comes
from HF which is a weak acid...

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by joeyeehu...



Chemistry
Best Answer - Chosen by Voters

You are right. CaF2 is slightly basic.The reason is HF is a weak acid ( but it is very corrosive).When dissolved in water, the F- ion formed will undergoes hydrolysis reaction with water molecules forming HF and OH-. Thats why, it is basic.

F- + H2O ---------------> HF + OH-

Ca(OH)2 is a strong base.