The solubility order for alkali metal fluoride in water is :

Question

The solubility order for alkali metal fluoride in water is : (A) LiF < RbF < KF < NaF (B) RbF < KF < NaF < LiF (C) LiF < NaF < KF < RbF (D) LiF>NaF>KF>RbF

Tardigrade Admin · Accepted Answer

lattice enthalpy propto (1/S o l u b i l i t y) Since the lattice enthalpy follow the order textLiF text> textNaF text> textKF text> textRbF Hence, the correct order of solubility is LiF < NaF < KF < RbF

Q. The solubility order for alkali metal fluoride in water is :

$L i F < R b F < K F < N a F$

$R b F < K F < N a F < L i F$

$L i F < N a F < K F < R b F$

$L i F > N a F > K F > R b F$

lattice enthalpy $\propto \frac{1}{S o l u bi l i t y}$
Since the lattice enthalpy follow the order
$LiF > NaF > KF > RbF$
Hence, the correct order of solubility is
$L i F < N a F < K F < R b F$

Q. The solubility order for alkali metal fluoride in water is :

LiF<RbF<KF<NaF

RbF<KF<NaF<LiF

LiF<NaF<KF<RbF

LiF>NaF>KF>RbF

lattice enthalpy ∝Solubility1​ Since the lattice enthalpy follow the order LiF>NaF>KF>RbF Hence, the correct order of solubility is LiF<NaF<KF<RbF

$L i F < R b F < K F < N a F$

$R b F < K F < N a F < L i F$

$L i F < N a F < K F < R b F$

$L i F > N a F > K F > R b F$

lattice enthalpy $\propto \frac{1}{S o l u bi l i t y}$
Since the lattice enthalpy follow the order
$LiF > NaF > KF > RbF$
Hence, the correct order of solubility is
$L i F < N a F < K F < R b F$