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Hydration Enthalpy and Lattice Enthalpy (Group 2)

Solubility of...

Question

Solubility of an ionic compound in water is mainly dependent on:
a. Lattice enthalpy
b. Hydration enthalpy
Both these factors oppose each other, and the resultant of these factors determines the solubility of an ionic compound in water. If the lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly soluble in water.

A compound is soluble in water if the hydration enthalpy is:

A

Greater than the lattice enthalpy

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B

Less than the lattice enthalpy

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C

Same as the lattice enthalpy

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D

None of the above

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Solution

The correct option is A Greater than the lattice enthalpy
A compound is soluble in water if its hydration enthalpy is more than the lattice energy.

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Q. Solubility of an ionic compound in water is mainly dependent on:
a. Lattice enthalpy
b. Hydration enthalpy
Both these factors oppose each other, and the resultant of these factors determines the solubility of an ionic compound in water. If the lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly soluble in water.

B e F_{2}

is soluble in water while fluorides of other alkaline earth metals are insoluble because of:

Q. Solubility of an ionic compound in water is mainly dependent on:
a. Lattice enthalpy
b. Hydration enthalpy
Both these factors oppose each other, and the resultant of these factors determines the solubility of an ionic compound in water. If the lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly soluble in water.

B e F_{2}

is soluble in water while fluorides of other alkaline earth metals are insoluble because of:

Q. The lattice enthalpy and hydration enthalpy of four compounds are given below:

Compound	Lattice enthalpy $(k J / m o l)$	Hydration enthalpy $(k J / m o l)$
$P$	$+ 780$	$- 920$
$Q$	$+ 1012$	$- 812$
$R$	$+ 828$	$- 878$
$S$	$+ 632$	$- 600$

The pair of compounds which is soluble in water is:

Q. The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions.
Amongst fluorides of alkali metals, the lowest solubility of

L i F

in water is due to:

Q. The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of

L i F

in water is due to:

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