Chemistry A-Level
Per-mole basis for a single ion type
What Per-mole basis for a single ion type means in Chemistry A-Level, as defined for OCR.
Definition of Per-mole basis for a single ion type
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Reference: OCR
Because the definition fixes the amount at 1 mol of gaseous ions, ∆hydH is quoted per mole of that ion, so a compound such as MgCl₂ involves two separate hydration values.
Topics that use Per-mole basis for a single ion type
- Lattice enthalpy (OCR A-Level)
Related terms
- Born–Haber cycle
- Effect of ionic charge and radius on lattice enthalpy
- Electron affinity
- Enthalpy change of hydration
- Enthalpy change of solution
- Enthalpy of atomisation
- enthalpy of formation
- Enthalpy sign and exothermic formation
Using Per-mole basis for a single ion type in the exam
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