A precipitate forms in a double-replacement reaction when the cations from one of the reactants combine with the anions from the other reactant to form an insoluble ionic compound. When aqueous solutions of potassium iodide and lead II nitrate are mixed, the following reaction occurs:. The other product of the reaction, potassium nitrate, remains soluble. Some double-replacement reactions produce a gaseous product which then bubbles out of the solution and escapes into the air.
When solutions of sodium sulfide and hydrochloric acid are mixed, the products of the reaction are aqueous sodium chloride and hydrogen sulfide gas. Another kind of double-replacement reaction is one that produces a molecular compound as one of its products. Many examples in this category are reactions that produce water. When aqueous hydrochloric acid is reacted with aqueous sodium hydroxide, the products are aqueous sodium chloride and water:. Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution.
Gas Formation Reactions Many sulfide salts will react with acids to form gaseous hydrogen sulphide. Insoluble gases are often formed by the breakdown of unstable double displacement reaction products. For example, marble chips CaCO 3 react with dilute hydrochloric acid to form calcium chloride and carbonic acid. Carbonic acid is unstable and readily decomposes to form carbon dioxide and water.
Students classify the compounds that give double displacement reactions. Students acquire the skill to perform a double displacement reaction using barium chloride and sodium sulphate.
Students will be able to distinguish a double displacement reaction from a given set of chemical reactions in future. Cite this Simulator: amrita. Retrieved 11 November , from amrita. A double displacement reaction usually occurs in solution and one of the products, being insoluble, precipitates out.
It has to do with the reactivity series. Hence, Statement 2 is NOT correct. The reaction between barium chloride solution and sodium sulfate solution to form barium sulfate precipitate is an example of a precipitation reaction.
Get Started for Free Download App. More Chemical Reaction Questions Q1. For the production of which of the following is the 'Haber Process' used? The process in which the ore is heated in excess of air below its melting point is known as. In fireworks, the green flame is produced because of. Gypsum CaSO,. If nitrogen is present in the original fuel, it is converted to N 2 , not to a nitrogen-oxygen compound.
Thus, for the combustion of the fuel dinitroethylene, whose formula is C 2 H 2 N 2 O 4 , we have. The products of the reaction are CO 2 and H 2 O, so our unbalanced equation is. Balancing and you may have to go back and forth a few times to balance this , we get.
Propane is a fuel used to provide heat for some homes. Propane is stored in large tanks like that shown here. Is it possible for a composition reaction to also be a combustion reaction? Give an example to support your case. Is it possible for a decomposition reaction to also be a combustion reaction? The oxide of boron formed is B 2 O 3.
The oxide of sulfur formed is SO 2. The oxide of sulfur formed is SO 3. Assuming that each single-replacement reaction occurs, predict the products and write each balanced chemical equation. Assuming that each double-replacement reaction occurs, predict the products and write each balanced chemical equation. Use the solubility rules to predict if each double-replacement reaction will occur and, if so, write a balanced chemical equation. Authored by : Jessie A. Key and David W. Provided by : BCCampus.
Skip to main content. Chapter 7. The Mole Concept. Search for:. Classify chemical reactions as one of these three types given appropriate descriptions or chemical equations.
Composition Reactions. Example 1: Composition and Decomposition Reactions Identify each equation as a composition reaction, a decomposition reaction, or neither. This is a composition reaction.
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