Double Displacement Reaction
In a Double Displacement Reaction, two compounds react, and their ions are exchanged. This type of reaction is also known as a ‘Metathesis Reaction.’ Such reactions occur when ions with similar charges are swapped. For a double displacement reaction to occur, one of the products must be a precipitate or water.
ZnS(s) + 2Hcl(aq) → Zncl2(aq) + H2S(g)
There are two main categories of double displacement reactions:
Precipitation Reactions
Precipitation Reactions is a chemical reaction in which two aqueous solutions of compounds combine to form an insoluble compound (precipitate) and a soluble compound. For example, the formation of calcium sulfate as a white precipitate when sulfuric acid reacts with calcium carbonate:
CaCO3(aq) + H2SO4(aq) → CaSO4(s)↓ + H2O(l) + CO2(g)
Neutralization Reactions or Acid-Base Reaction
This type of reaction takes place when an acid and a base react to produce a salt and water. This reaction is named ‘Neutralization Reaction‘ since the acid and base neutralize each other. An example is the reaction between hydrochloric acid and sodium hydroxide
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
Chemical Reactions
Chemical Reaction is the disruption of existing bonds within reactant molecules and the creation of fresh bonds in product molecules, culminating in the formation of a new substance. These reactions are all around us, spanning from the biochemical processes in our bodies that extract energy from food to the source of sunlight, where chemical reactions are used to produce the light we receive.
In this article, we will understand the meaning and characteristics of Chemical Reactions. This article will cover the various types of Chemical Reactions: Combination or Synthesis Reaction, Decomposition Reaction, Single Displacement Reaction, and Double Displacement Reaction. We also discuss factors affecting the rate of Reaction and practice questions to understand this article.
Table of Content
- What is a Chemical Reaction?
- Characteristics of a Chemical Reaction
- How would we know when a Reaction has taken place?
- Chemical Equation
- Balancing a Chemical Equation
- Types of Chemical Reaction