Common Ion Test Method (Carbonate Ion)
Carbonate ion (CO₃²⁻) test: Add dilute hydrochloric acid to the test solution and pass the generated gas into clear limewater. If a colorless, odorless gas (CO…
Syllabus path: Properties of Substances and Reactions › Ionic Reactions & Testing
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This formula is aligned to the CSCA undergraduate admissions exam syllabus. Continue with the linked tutorial and topic practice.
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CSCA Chemistry Formula Reference
Formula and explanation
Carbonate ion (CO₃²⁻) test: Add dilute hydrochloric acid to the test solution and pass the generated gas into clear limewater. If a colorless, odorless gas (CO₂) is produced that turns the clear limewater milky, it indicates the presence of CO₃²⁻. Reaction: CO₃²⁻ + 2H⁺ ightarrow CO₂ + H₂O, CO₂ + Ca(OH)₂ ightarrow CaCO₃ + 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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