Enthalpy of Solution & Hydration (AQA A-Level Chemistry): Quizzes

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Enthalpy of Solution & Hydration
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What is the enthalpy of solution?

Enthalpy change when 1 mole dissolves

What happens to the lattice structure when an ionic compound dissolves in water?

It breaks down

What is the formula for enthalpy of solution?

ΔHsol=ΔHlattice+ΔHhydration\Delta H_{sol} = \Delta H_{lattice} + \Delta H_{hydration}

Is lattice dissociation endothermic or exothermic?

Endothermic

Is the enthalpy of hydration endothermic or exothermic?

Exothermic

What type of molecule is water?

Polar molecule

Which end of water molecules is attracted to positive ions?

Negative end

Which end of water molecules is attracted to negative ions?

Positive end

What happens energetically during hydration?

Energy is released

For NaClNaCl, which enthalpies are needed to calculate ΔHsol\Delta H_{sol}?

ΔHlattice\Delta H_{lattice}, ΔHhyd\Delta H_{hyd} for Na+Na^+ & Cl−Cl^-

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