Interactive Chemistry Worksheets for Students |
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Carbonates are compounds that contain the CO3 group.
Sodium hydrogen carbonate also called bi-carb of soda or baking soda is a common household carbonate.
Its chemical formula is NaHCO3
Identify which chemical compounds contain the carbonate group.
Click on the links for the answers.
No. |
Chemical
|
Carbonate? Yes/No
|
---|---|---|
1. | Na2SO4 sodium sulfate | Is this a carbonate? No |
2. | Na2CO3 sodium carbonate | Is this a carbonate? Yes |
3. | NaNO3 sodium nitrate | Is this a carbonate? No |
4. | CuSO4 copper sulfate | Is this a carbonate? No |
5. | CuCO3 copper carbonate | Is this a carbonate? Yes |
6. | CaCO3 calcium carbonate | Is this a carbonate? Yes |
7. | Ca(NO3)2 calcium nitrate | Is this a carbonate? No |
8. | PbSO4 lead sulfate | Is this a carbonate? No |
9. | MgCO3 magnesium carbonate | Is this a carbonate? Yes |
10. | SiC silicon carbide | Is this a carbonate? No |
Key point:
Compounds with a carbonate or CO3 group react with acids to produce carbon dioxide, CO2 gas.
All carbonates react with acids to produce salt, water and carbon dioxide gas.
The fizz produced in sherbet is a reaction between a food acid and a carbonate.
The ingredients dissolve in your mouth and react with each other producing the carbon dioxide fizz.
1. Hydrochloric acid + sodium carbonate sodium chloride + water + carbon dioxide
2HCl + Na2CO3 2NaCl + H2O + CO2
2. Sulfuric acid + copper carbonate copper sulfate + water + carbon dioxide
H2SO4 + CuCO3 CuSO4 + H2O + CO2
3. Nitric acid + magnesium carbonate magnesium nitrate + water + carbon dioxide
2HNO3 + MgCO3 Mg(NO3)2 + H2O + CO2
4. Acetic acid + sodium hydrogen carbonate sodium acetate + water + carbon dioxide
CH3COOH + NaHCO3 CH3COONa + H2O + CO2