CH-1625
Tests for cations
Chemistry · Secondary 4 · Medium · Tests for cations
A sample of sodium carbonate is suspected to be contaminated with barium carbonate. A student adds excess dilute nitric acid to the solid, then adds aqueous sodium sulfate to the filtered solution.
Which observation shows that barium carbonate was present?
Which observation shows that barium carbonate was present?
- Effervescence when nitric acid is added
- Solution turns blue when sodium sulfate is added
- White precipitate forms when sodium sulfate is added
- Colourless gas turns limewater milky
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