Question: Explanation Concentration Ca(NO 3 ) 2 = 0.3 M volume Ca(NO 3 ) 2 = 0.1 L moles Ca(NO 3 ) 2 = (Concentration Ca(NO

Explanation

Concentration Ca(NO3)2 = 0.3 M

volume Ca(NO3)2 = 0.1 L

moles Ca(NO3)2 = (Concentration Ca(NO3)2) * (volume Ca(NO3)2)

moles Ca(NO3)2 = (0.3 M) * (0.1 L)

moles Ca(NO3)2 = 0.03 mol

final volume = 0.1 L + 0.2 L = 0.3 L

final concentration of Ca(NO3)2 = (moles Ca(NO3)2) / (final volume)

final concentration of Ca(NO3)2 = (0.03 mol) / (0.3 L)

final concentration of Ca(NO3)2 = 0.1 M

Similarly, final concentration of NaF = 0.04 M

Reaction quotient, Qsp = [Ca2+][F-]2

Qsp = (0.1 M) * (0.04 M)2

Qsp = 1.6 x 10-4

Since Qsp > Ksp, therefore, precipitate will form.

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