Combination Reaction

 A combination reaction is a type of chemical reaction where two or more substances combine to form a single, new substance. This usually happens when elements or compounds come together to create a more complex compound. Let's break down the concept with some simple examples:


1. Hydrogen (H2) combines with oxygen (O2) to form water (H2O).

2. Iron (Fe) reacts with sulfur (S) to produce iron sulfide (FeS).

3. Carbon (C) combines with oxygen (O2) to make carbon dioxide (CO2).

4. Sodium (Na) reacts with chlorine (Cl2) to form sodium chloride (NaCl), which is table salt.

5. Nitrogen (N2) combines with hydrogen (H2) to create ammonia (NH3).


These examples involve elements coming together, but combination reactions can also occur with compounds:


6. Ethene (C2H4) combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).

7. Sulfur dioxide (SO2) reacts with oxygen (O2) to form sulfur trioxide (SO3).

8. Carbon monoxide (CO) combines with oxygen (O2) to produce carbon dioxide (CO2).

9. Calcium oxide (CaO) reacts with water (H2O) to create calcium hydroxide (Ca(OH)2).

10. Ammonium chloride (NH4Cl) combines with sodium hydroxide (NaOH) to make ammonia (NH3) and sodium chloride (NaCl).


Combination reactions can also involve more complex compounds:


11. Glucose (C6H12O6) combines with oxygen (O2) to form carbon dioxide (CO2) and water (H2O) during cellular respiration.

12. Methane (CH4) combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O) during combustion.

13. Acetylene (C2H2) reacts with oxygen (O2) to create carbon dioxide (CO2) and water (H2O).


These examples show how combination reactions can occur in various chemical contexts. In each case, two or more substances join together to produce a new compound or compounds.

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