f chemical reactions. Type of Reaction Synthesis Decomposition General Equation A+B C AB A + B Example 2Na + Cl2 2NaCl 2H2 O 2H2 + O2 Type of Reaction Single Replacement Double Replacement Combustion General Equation A+BC B+ AC AB+ CD AD + CB fuel + oxygen carbon dioxide + water Example 2K + 2H2 O 2KOH + H2 NaCl+ AgF NaF + AgCl CH4 + 2O2 CO2 + 2H2 O Q: The burning of wood is a chemical reaction. Which type of reaction is it? A: The burning of woodor of anything elseis a combustion reaction. In the combustion example in the table, the fuel is methane gas (CH4 ). Click image to the left or use the URL below. URL:
what is a chemical reaction
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products can be elements or compounds. Chemical reactions are represented by chemical equations, like the one below, in which reactants (on the left) are connected by an arrow to products (on the right). Reactants Products Chemical reactions may occur quickly or slowly. Look at the two pictures in the Figure 1.1. Both represent chemical reactions. In the picture on the left, a reaction inside a fire extinguisher causes foam to shoot out of the extinguisher. This reaction occurs almost instantly. In the picture on the right, a reaction causes the iron tool to turn to rust. This reaction occurs very slowly. In fact, it might take many years for all of the iron in the tool to turn to rust. Q: What happens during a chemical reaction? Where do the reactants go, and where do the products come from? A: During a chemical reaction, chemical changes take place. Some chemical bonds break and new chemical bonds form.
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a chemical reaction changes some substances into other substances with different chemical properties.
--> a. true b. false
the substances involved in a chemical reaction may be elements or compounds.
--> a. true b. false
during a chemical reaction
--> a) chemical bonds break. b) matter is destroyed. c) new atoms form. d) two of the above
which of the following represents a synthesis reaction?
--> a) 2h2 + o2 2h2o b) 2k + 2h2o 2koh + h2 c) 2nacl 2na + cl2 d) none of the above
which type of reaction is represented by the following chemical equation? ch4 + 2o2 co2 + 2h2o
--> a) combustion reaction b) decomposition reaction c) single replacement reaction d) double replacement reaction
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