A solution containing sodium fluoride is mixed with one containing calcium nitrate to form a solution that is 0.015 M in NaF and 0.010 M in Ca(NO3)2.
NaF is a strong salt so [F-]= 0.015 M
Ca(NO3)2 is a strong salt and [Ca2+]= 0.010 M
the net ionic equation is
Ca2+ 2 F- = CaF2 (s)
Qsp = [Ca2+][F-]^2 =( 0.010)(0.015)^2=2.3 x 10^-6 >> Ksp so precipitation should occur
mastering chem awnser is CaF2 they just wantt the solid
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