Chemistry Practicals Class 10
Double Displacement Reactions
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About Simulation
- In this virtual laboratory setting, you can virtually mix barium chloride and sodium sulphate to observe the double displacement reaction.
- Through this simulation, you can enhance your understanding of the concept of double displacement reactions in chemistry.
- By engaging with the simulation, you can observe and analyze the reaction between barium chloride and sodium sulphate in detail.
- You will be able to identify and comprehend the formation of new substances during the double displacement reaction, deepening your knowledge of chemical transformations.
- Through this interactive experiment, you can learn about the precipitate formed and its properties, providing valuable insights into the outcomes of double displacement reactions.
Simulation Details
Description
Double displacement (metathesis or exchange) reactions are defined as chemical reactions in which one component of each of both the reacting molecules is exchanged to form the products. During this reaction, the cations and anions of two different compounds switch places, forming two entirely different compounds.
The general equation which represents a double displacement reaction can be written as:
Double displacement reactions generally take place in aqueous solutions in which the ions precipitate, and there is an exchange of ions.
For example, on mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is formed. These reactions are ionic. The reactants change into ions when dissolved in water, and there is an exchange of ions in the solution. This results in the formation of product molecules.
Double displacement reactions can be further classified as neutralization, precipitation, and gas formation reactions.
1) Neutralization Reactions
Neutralization reactions are a specific kind of double displacement reaction. An acid-base reaction occurs when an acid reacts with an equal quantity of base. The acid-base reaction results in the formation of salt (neutral) and water.
- On mixing an aqueous solution of hydrochloric acid with an aqueous solution of sodium hydroxide, sodium chloride and water are formed.
2) Precipitation Reactions
Precipitation is the formation of a solid in a solution or inside another solid during a chemical reaction. This process usually takes place when the concentration of dissolved ions in the solution exceeds the solubility product.
- On mixing aqueous solutions of silver nitrate and sodium chloride, a white, curdy precipitate of silver chloride is formed.
3) Gas Formation Reactions
A double displacement reaction should also occur if an insoluble gas is formed. Gases such as HCl and NH3 are soluble in water, but some other gases, such as H2S, are not soluble in water.
- Many sulphide salts will react with acids to form gaseous hydrogen sulphide.
Requirements for this Science Experiment
- Barium chloride solution
- Sodium sulphate solution
- Test tube
- Test tube stand
- Droppers
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