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Crystalline and Amorphous Solid

How more latt...

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How more lattice energy causes less solubility ?

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Q. Sodium sulphate is soluble in water whereas barlum sulphate is sparingly soluble because
(a) the hydration energy of

N a_{2} S O_{4}

is less than its lattice energy
(b) the hydration energy of

N a_{2} S O_{4}

is more than its lattice energy
(c) the lattice energy of

B a S O_{4}

is more than its lattice energy.
(d) the lattice energy has no rolw to play in solubility.

Q. Assertion :The fluorides of alkaline earth metals are relatively less soluble than chlorides. Reason: Fluorides have high lattice energies.

L i F

has more covalent character than

C s F

. Reason: Lattice energy of

C s F

is less than that of

L i F

.

Q. Lattice energy and hydration energy are two important properties of ionic solids on which their melting point, boiling point and solubility depend. Lattice energy increases as the charge on the ion increases and the size decreases. Hydration energy increases as the size of the ion decreases and charges on it increases.
The solubilities of carbonates, sulphates and phosphates of alkaline earth metals are much less than those of the corresponding alkali metals. This is because:

Q. "Decreasing lattice energy favours increased solubility while decreasing hydration energy favours decreased solubility."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

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