Why Is Iron(III) More Acidic Than Iron(II)?

This free classroom-ready resource explains one of the most frequently examined concepts in A-Level Chemistry: why iron(III) solutions are more acidic than iron(II) solutions.

Students often know that iron(III) solutions are more acidic than iron(II) solutions but struggle to explain why. This resource uses a clear visual approach to develop understanding of charge density, polarisation of the O–H bond and proton release from hydrated metal ions.

The resource includes:

• Premium ACE illustration

• Clear classroom explanation

• Key learning points

• Discussion questions

• Examination-style practice

• Mark scheme

• QR code linking to the accompanying FranklyChemistry video explanation

Ideal for:

• AQA A-Level Chemistry

• OCR A-Level Chemistry

• Edexcel A-Level Chemistry

• CCEA Chemistry

• WJEC Chemistry

The resource can be used as a classroom introduction, revision activity, homework task or independent learning resource.

Suitable for classroom teaching, revision, homework or independent study.

This resource forms part of the FranklyChemistry Classroom Snapshot series, where important chemistry questions are explored using original ACE illustrations and concise explanations.