What are Chemical Reactions?
A chemical reaction is a process in which physical and chemical properties of the a substance change while the existing bonds are broken and form new bonds. This gives the new substances different physical and chemical properties.
What are the different types of Reactants?
The different type of Reactions are as followed:
- Synthesis/ Direct Combination Reaction
- Decomposition Reaction
- Single-Replacement Reaction
- Double-Replacement Reaction
- Combustion Reaction
Synthesis/ Combination Reaction
This reaction happens when two or more reactants form one product.
A + B → AB
Example
8 Fe + S⬇8 → 8 FeS
A + B → AB
Example
8 Fe + S⬇8 → 8 FeS
Decomposition Reaction
This reaction happens when one reactant forms two or more products.
AB → A + B
Examples
2 HgO → 2 Hg + O⬇2
2 NaCl → 2 Na + Cl⬇2
AB → A + B
Examples
2 HgO → 2 Hg + O⬇2
2 NaCl → 2 Na + Cl⬇2
Single-Replacement Reactions
This reaction happen when a single element and a compound become a different element and compound.
A + BX → AX + B
A + BX → AX + B
- Examples
Double-Replacement Reactions
This reaction happens when two compounds become two different compounds.
AX + BY → AY + BX
Examples
HNO⬇3 + NaOH → NaNO⬇3 + H⬇2O
NH⬇4Cl + NaOH → NaCl + NH⬇4OH
AX + BY → AY + BX
Examples
HNO⬇3 + NaOH → NaNO⬇3 + H⬇2O
NH⬇4Cl + NaOH → NaCl + NH⬇4OH
Combustion Reaction
This reaction happens when an element or compound reacts with oxygen producing carbon dioxide, water, and heat.
Example
C⬇2H⬇5OH + 3 O⬇2 → 2 CO⬇2 + 3 H⬇2O
Example
C⬇2H⬇5OH + 3 O⬇2 → 2 CO⬇2 + 3 H⬇2O
This video shows how reaction rates can be affected by factors such as temperature