CH-66
Reactions of acids
Chemistry · Secondary 3 · Medium · Reactions of acids
A student adds excess dilute hydrochloric acid to solid calcium carbonate. Which gas is produced and how can it be confirmed?
- Hydrogen; it relights a glowing splint.
- Hydrogen; it gives a squeaky pop with a lighted splint.
- Carbon dioxide; it turns limewater milky.
- Oxygen; it turns limewater colourless.
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