Common Cation Tests ( NH₄⁺, Fe³⁺, Cu²⁺ )
NH₄⁺: Add NaOH solution and heat, a gas is produced that turns moist red litmus paper blue. Fe³⁺: Add KSCN solution, the solution turns blood - red. Cu²⁺: Add…
Syllabus path: Properties of Substances and Reactions › Ionic Reactions & Testing
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CSCA Chemistry Concept & Principle Guide
Concept, principle, and explanation
NH₄⁺: Add NaOH solution and heat, a gas is produced that turns moist red litmus paper blue. Fe³⁺: Add KSCN solution, the solution turns blood - red. Cu²⁺: Add NaOH solution, a blue precipitate forms.
Related tutorial and examples
Ionic Reactions & Testing
Ionic Reactions & Testing 1. Core Concept: Writing Ionic Equations The essence of an ionic reaction is the reduction of ion concentration. In the CSCA exam, "Split or Keep" is the most frequent testing point for writing and judging ionic equations. The "Split or Keep" Rules 1. Wr…
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