Common Ion Test Method (Ammonium Ion)
Ammonium ion (NH₄⁺) test: Add concentrated sodium hydroxide solution to the test solution and heat. Place moist red litmus paper near the mouth of the test tub…
Syllabus path: Properties of Substances and Reactions › Ionic Reactions & Testing
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CSCA Chemistry Formula Reference
Formula and explanation
Ammonium ion (NH₄⁺) test: Add concentrated sodium hydroxide solution to the test solution and heat. Place moist red litmus paper near the mouth of the test tube. If a gas with a pungent odor (NH₃) is produced that turns the red litmus paper blue, it indicates the presence of NH₄⁺. Reaction: NH₄⁺ + OH⁻ Δ NH₃ + H₂O.
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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