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Thermal Expansion

Hydration ene...

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Hydration energy and lattice energy. Define?

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M g S O_{4}

is water soluble but

B a S O_{4}

is not. Reason: The lattice energy of

B a S O_{4}

predominates over its hydration energy while in

M g S O_{4}

M g^{2 +}

being smaller in size and thus hydration energy predominates over lattice energy of

M g S O_{4}

.

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.

In which of the following the hydration energy is higher than the lattice energy

Q. In which of the following, the hydration energy is higher than the lattice energy?

C s I

is insoluble in water. Reason: Hydration energy of

C s^{+}

I^{-}

ions are higher than lattice energy.

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