Chemistry A-Level
Gas detection using litmus
What Gas detection using litmus means in Chemistry A-Level, as defined for OCR.
Definition of Gas detection using litmus
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Reference: OCR
The gas is detected by its pungent smell and by turning damp red litmus paper blue, because NH₃ is an alkaline gas that dissolves to form OH⁻ ions.
Topics that use Gas detection using litmus
- The periodic table - 3.1.4 Qualitative analysis (OCR A-Level)
Related terms
- Ammonium ion identification
- Anion identification
- Characteristic reactions
- Confirmatory tests with ammonia
- Interference from carbonate ions
- ionic equations
- Linking reagents and observations to a named ion
- Precipitation reactions
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