What happens when acids react with metal and metal carbonates

Acid reacts with metal produces metal salt and hydrogen gas.
For example: Sodium reacts with hydrochloric acid to produce sodium chloride salt and hydrogen gas.
2Na + 2HCl  → 2NaCl + H2

‚ÄčAcid reacts with metal carbonates produces metal salt, water and carbon dioxide.
For example: Sodium carbonate reacts with hydrochloric acid to produce sodium chloride, water and carbon dioxide.
2HCl + Na2CO3   2NaCl + H2O + CO2
 

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metals produce hydrogen gas when put in acid

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