CH-123
Reactions of acids
Chemistry · Secondary 3 · Medium · Reactions of acids
A student adds excess dilute hydrochloric acid to 2.0 g of magnesium carbonate. Carbon dioxide gas is produced. Which observation shows that the reaction has stopped?
- The solution turns colourless.
- No more bubbles are seen.
- The beaker feels cold.
- All the solid dissolves immediately.
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