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

Higher the lattice enthalpy lower will be solubility
i.e., lattice enthalpy

\propto \frac{1}{Solubility}

Since the lattice enthalpy of alkali metals follow the order

L i > N a > K > R b

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

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

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

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

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

Higher the lattice enthalpy lower will be solubility
i.e., lattice enthalpy $\propto \frac{1}{Solubility}$
Since the lattice enthalpy of alkali metals follow the order
$L i > N a > K > R b$
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

Higher the lattice enthalpy lower will be solubility i.e., lattice enthalpy ∝Solubility1​ Since the lattice enthalpy of alkali metals follow the order Li>Na>K>Rb Hence the correct order of solubility is LiF<NaF<KF<RbF

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

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

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

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

Higher the lattice enthalpy lower will be solubility
i.e., lattice enthalpy $\propto \frac{1}{Solubility}$
Since the lattice enthalpy of alkali metals follow the order
$L i > N a > K > R b$
Hence the correct order of solubility is
$L i F < N a F < K F < R b F$