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A2 Chemistry > F325 Past Papers > Flashcards

F325 Past Papers Flashcards

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1
Q

What is lattice enthalpy?

A

(The enthalpy change that accompanies) the formation of one mole of a(n ionic) compound from its gaseous ions
(under standard conditions).

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2
Q

Why is the enthalpy change of hydration exothermic?

A

Hydration involves bond forming.

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3
Q

The enthalpy change of hydration of magnesium ions is more exothermic than the enthalpy
change of hydration of calcium ions.
Explain why.

A

Magnesium ion has a greater charge density, so magnesium ions have a stronger attracction to H20.

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A2 Chemistry (15 decks)

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