Question

Sort the chemical equations based on the chemical reactions they represent.

*water → hydrogen + oxygen
*iron + oxygen → iron oxide
*sodium + chlorine → sodium chloride
*sulfur + oxygen → sulfur dioxide
*potassium + chlorine → potassium chloride
*calcium carbonate →calcium oxide + carbon dioxide

Answer 1

Decomposition reactions are said to be those reactions in which a reactants breakdown into two or more products. The general reaction for decomposition reactions is as follow,

ABC → A + B + C

Specific Examples are as,

Water → Hydrogen + Oxygen

2 H₂O → 2 H₂ + O₂

Calcium carbonate → Calcium oxide + Carbon dioxide

CaCO₃ → CaO + CO₂

While, Synthetic reactions are said to be those reactions in which two or more reactants combine to form two or more products. The general reaction for synthetic reactions is as follow,

A + B + C → ABC

Specific Examples are as,

Iron + Oxygen → Iron Oxide

2 Fe + 3 O₂ → 2 Fe₂O₃

Sodium + Chlorine → Sodium chloride

2 Na + Cl₂ → 2 NaCl

Sulfur + Oxygen → Sulfur dioxide

S + O₂ → SO₂

Potassium + Chlorine → Potassium chloride

2 K + Cl₂ → 2 KCl

Answer 2

The classification would be as follows:

*water → hydrogen + oxygen = decomposition
*iron + oxygen → iron oxide = synthesis
*sodium + chlorine → sodium chloride = synthesis
*sulfur + oxygen → sulfur dioxide = synthesis
*potassium + chlorine → potassium chloride = synthesis
*calcium carbonate →calcium oxide + carbon dioxide = decomposition

Hope this answers the question. Have a nice day.