Explain the types of reaction with one example
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Answer:
Different Types of Chemical Reactions
Different Types of Chemical ReactionsThe types of chemical reaction are:
1.Combination reaction
2.Decomposition reaction
3.Displacement reaction
4.Double Displacement reaction
5.Precipitation Reaction
1. Combination Reaction
1. Combination ReactionA reaction in which two or more reactants combine to form a single product is known as a combination reaction.
1. Combination ReactionA reaction in which two or more reactants combine to form a single product is known as a combination reaction.It takes the form of X + Y → XY
1. Combination ReactionA reaction in which two or more reactants combine to form a single product is known as a combination reaction.It takes the form of X + Y → XYCombination reaction is also known as a synthesis reaction.
1. Combination ReactionA reaction in which two or more reactants combine to form a single product is known as a combination reaction.It takes the form of X + Y → XYCombination reaction is also known as a synthesis reaction.Example of combination reaction: 2Na + Cl2 → 2NaCl
2. Decomposition Reaction
2. Decomposition ReactionA reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.
2. Decomposition ReactionA reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.It takes the form of XY → X + Y
2. Decomposition ReactionA reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.It takes the form of XY → X + YA decomposition reaction is just the opposite of combination reaction.
2. Decomposition ReactionA reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.It takes the form of XY → X + YA decomposition reaction is just the opposite of combination reaction.Example of a decomposition reaction: CaCO3 → CaO + CO2
2. Decomposition ReactionA reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.It takes the form of XY → X + YA decomposition reaction is just the opposite of combination reaction.Example of a decomposition reaction: CaCO3 → CaO + CO2The reaction in which a compound decomposes due to heating is known as a thermal decomposition reaction.
3. Displacement Reaction
3. Displacement ReactionA chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.
3. Displacement ReactionA chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.It takes the form X + YZ → XZ + Y
3. Displacement ReactionA chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.It takes the form X + YZ → XZ + YIt is also called a substitution reaction
3. Displacement ReactionA chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.It takes the form X + YZ → XZ + YIt is also called a substitution reactionExample of displacement reaction: Zn + CuSO4 → ZnSO4 + Cu
4. Double Displacement Reaction
4. Double Displacement ReactionA chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.
4. Double Displacement ReactionA chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.It takes the form of XY + ZA → XZ + YA
4. Double Displacement ReactionA chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.It takes the form of XY + ZA → XZ + YAIt is also called a metathesis reaction
4. Double Displacement ReactionA chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.It takes the form of XY + ZA → XZ + YAIt is also called a metathesis reactionExample of double displacement reaction:
4. Double Displacement ReactionA chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.It takes the form of XY + ZA → XZ + YAIt is also called a metathesis reactionExample of double displacement reaction: BBaCl2 + Na2SO4 → BaSO4 + 2NaCl
5. Precipitation Reaction
5. Precipitation ReactionA chemical reaction that involves the formation of an insoluble product (precipitate; solid) is called Precipitation reaction.
Examples of Precipitation Reaction
Examples of Precipitation ReactionThe reaction between silver nitrate (AgNO3) and sodium chloride (NaCl), results in the formation of silver chloride (AgCl) that is an insoluble salt.
Answer:
Oxidation-Reduction or Redox Reaction
In a redox reaction, the oxidation numbers of atoms are changed. Redox reactions may involve the transfer of electrons between chemical species.
The reaction that occurs when In which I2 is reduced to I- and S2O32- (thiosulfate anion) is oxidized to S4O62- provides an example of a redox reaction:
2 S2O32−(aq) + I2(aq) → S4O62−(aq) + 2 I−(aq)
Direct Combination or Synthesis Reaction
In a synthesis reaction, two or more chemical species combine to form a more complex product.
A + B → AB
The combination of iron and sulfur to form iron (II) sulfide is an example of a synthesis reaction:
8 Fe + S8 → 8 FeS
Chemical Decomposition or Analysis Reaction
In a decomposition reaction, a compound is broken into smaller chemical species.
AB → A + B
The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction:
2 H2O → 2 H2 + O2
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Types of Chemical Reactions
List of Common Reactions and Examples
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The 4 Main Types of Chemical Reactions: synthesis, decomposition, single replacement, double replacement
ThoughtCo / Hilary Allison
By Anne Marie Helmenstine, Ph.D.
Updated January 25, 2020
A chemical reaction is a process generally characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds. There are several different types of chemical reactions and more than one way of classifying them. Here are some common reaction types:
Oxidation-Reduction or Redox Reaction
In a redox reaction, the oxidation numbers of atoms are changed. Redox reactions may involve the transfer of electrons between chemical species.
The reaction that occurs when In which I2 is reduced to I- and S2O32- (thiosulfate anion) is oxidized to S4O62- provides an example of a redox reaction:
2 S2O32−(aq) + I2(aq) → S4O62−(aq) + 2 I−(aq)
Direct Combination or Synthesis Reaction
In a synthesis reaction, two or more chemical species combine to form a more complex product.
A + B → AB
The combination of iron and sulfur to form iron (II) sulfide is an example of a synthesis reaction:
8 Fe + S8 → 8 FeS
Chemical Decomposition or Analysis Reaction
In a decomposition reaction, a compound is broken into smaller chemical species.
AB → A + B
The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction:
2 H2O → 2 H2 + O2
Single Displacement or Substitution Reaction
A substitution or single displacement reaction is characterized by one element being displaced from a compound by another element.
A + BC → AC + B
An example of a substitution reaction occurs when zinc combines with hydrochloric acid. The zinc replaces the hydrogen:
Zn + 2 HCl → ZnCl2 + H2
Metathesis or Double Displacement Reaction
In a double displacement or metathesis reaction two compounds exchange bonds or ions in order to form different compounds.
AB + CD → AD + CB
An example of a double displacement reaction occurs between sodium chloride and silver nitrate to form sodium nitrate and silver chloride.
NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)
Acid-Base Reaction
An acid-base reaction is a type of double displacement reaction that occurs between an acid and a base. The H+ ion in the acid reacts with the OH- ion in the base to form water and an ionic salt:
HA + BOH → H2O + BA
The reaction between hydrobromic acid (HBr) and sodium hydroxide is an example of an acid-base reaction:
HBr + NaOH → NaBr + H2O
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