Chemical reactions double-replacement

Metathesis reactions (double-replacement reactions)—chemical change that involves an exchange of positive ions between two compounds... 

In contrast to synthesis, combustion, and decomposition reactions, many chemical reactions are replacement reactions and involve the replacement of an element in a compound. These reactions are also called displacement reactions. There are two types of replacement reactions single-replacement reactions and double-replacement reactions. 

Write a balanced chemical reaction for each of the following double replacement reactions ... 

Here, the sign of equality (=) has been replaced by the double oppositely directed arrows (s=) called a sign of reversibility. Such a reaction is called a reversible reaction. The reversibility of reactions can be detected when both the forward and the reverse reactions occur to a noticeable extent. Generally, such reactions are described as reversible reactions. The most important criterion of a reaction of this type is that none of the reactants will become exhausted. When the reaction is allowed to take place in a closed system from where none of the substances involved in the reaction can escape, one obtains a mixture of the reactants and the products in the reaction vessel. Every reversible reaction, depending on its nature, will after some time reach a stage when the reactants and the products coexist in a state of balance, and their amounts will remain unaltered for unlimited time. Such a state of a chemical reaction is called chemical equilibrium, and the point of such an equilibrium varies only with temperature. 

Four ways in which chemical reactions may be classified are combination, decomposition, single replacement (substitution), and double replacement (metathesis). 

In general, a double replacement results if one combination of ions leads to a precipitate, a gas or an un-ionized or very slightly ionized species such as water. In all of these reaction classes, it is very often possible to use your physical senses to observe whether a chemical reaction has occurred. The qualitative criteria may involve the formation of a gaseous product, the formation of a precipitate, a change in color, or a transfer of energy. 

From the following list of chemicals, select two combinations that would lead to a double replacement reaction. Write the complete, balanced equations for the reactions of the chemicals in solution. 

The term metathesis literally means to transpose. The term double replacement is often used to describe these reactions because the cations switch places with each other. These are chemical reactions that involve an exchange of positive ions between two compounds and that generally take place between two ionic compounds in an aqueous solution. The driving force that causes these reactions to occur is a decrease in the number of ions from the reactants to... 

Write the balanced chemical equation for each double replacement reaction. Be sure to indicate the physical state of all products. 

The calcium carbonate in the eggshell sample undergoes a double-replacement reaction with the hydrochloric acid in step 10. Then the carbonic acid that was formed decomposes. Write a balanced chemical equation for these reactions. (Hint The gas observed was carbon dioxide.)... 

Chemists classify reactions in different ways. One way is to distinguish among five types of chemical reactions synthesis, combustion, decomposition, single-replacement, and double-replacement reactions. Some reactions fit equally well into more than one of these classes. 

Another type of double-replacement reaction that occurs in an aqueous solution produces water molecules. The water molecules produced in the reaction increase the number of solvent particles. Unlike reactions in which a precipitate forms, no evidence of a chemical reaction is observable because water is colorless and odorless and already makes up most of the solution. For example, when you mix hydrobromic acid with a sodium hydroxide solution, a double-replacement reaction occurs and water is formed. 

Synthesis, combustion, decomposition, singlereplacement, and double-replacement reactions are five classes of chemical reactions. 

In Chapter 10, you learned that a chemical reaction can usually be classified as one of five types—synthesis, decomposition, combustion, single-replacement, or double-replacement. In this chapter, you ll investigate a special characteristic of many of these reactions— the ability of elements to gain or lose electrons when they react with other elements. You experimented with this characteristic when you did the DISCOVERY LAB. 

An oxidation-reduction (redox) reaction is any chemical reaction in which electrons are transferred from one atom to another. Most chemical reachons other than double replacement reactions are oxidation-reduction reactions. 

The term metathesis literally means to transpose. The term double replacement is often used to describe these reactions because the cations switch places with each other. These are chemical reactions that involve an exchange of positive ions between two compounds and that generally take place between two ionic compounds in an aqueous solution. The driving force that causes these reactions to occur is a decrease in the number of ions from the reactants to products. This will occur when a stable product forms from the ionic reactants. The three types of stable products that can form are a precipitate (or an insoluble solid), a gas (gaseous materials will bubble out of the solutions and leave the reaction mixture), or a stable molecule (a weak electrolyte, or nonelectrolyte, such as water). A general equation for a double-replacement reaction is... 

If you are told the reactants and products of a reaction, it is not too difficult to write a balanced chemical equation for the process. But what if you are given only the reactants or only the products, or some combination of the two. Could you write the balanced equation It sounds like a difficult thing to do, but if you know the type of reaction and some or most of the reactants and products, it s likely you can complete the equation. You might want to consult the tables of ions and formula writing in Chapter 4 if you need to brush up on these topics. The focus here is on single- and double-replacement equations. 

Of the four classes of chemical reactions—synthesis, decomposition, single-replacement, and double-replacement—which would be the appropriate class for the reaction of hydrochloric acid with sodium hydroxide ... 

Chemical reactions, whether they involve the formation of precipitate, reaction with oxygen, acids and bases, or oxidation-reduction, generally follow one of a few simple patterns combination, decomposition, and single- or double- replacement. Recognizing the underl)dng pattern will improve your ability to write and understand chemical reactions. 

Chemical reactions involve the combination of reactants to produce products, the decomposition of reactant(s) into products, or the replacement of one or more elements in a compound to yield products. Replacement reactions are subclassified as either single- or double-replacement. 

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