STUDY GUIDE
CHEMICAL EQUATIONS
Complete each sentence.
1.The process by which one or more substances are changed into one or more different substances is called a(n)____________.
2.The starting substances in a chemical reaction are called________.
3.The symbol written after a formula to indicate a solid is_______.
4.In a balanced chemical equation, the number of_____of any given kind on the left side is equal to the number on the right side.
Match each reaction type with the correct description.
a.combustion
b.double displacement
c.synthesis
d.single displacement
e.decomposition
___5.The positive and negative portions of two compounds are interchanged.
___6.A compound burns, reacting with oxygen.
___7.Two or more substances combine to form one new substance.
___8.A substance breaks down to form simpler substances when energy is supplied.
___9.One element replaces another in a compound.
Write T for true or False. If a statement is false, replace the underlined word or phrase with one that will make the statement true, and write correction on the blank provided.
______10.The symbol (aq) after a formula indicates that the substance is dissolved in water.
______11.A number written to the left of a formula in an equation is called a subscript.
______12.Carbon and water are typical products in a combustion reaction.
______13.The substances generally written on the right in chemical equations are called products.
______14.In a chemical equation, the symbol that stands for yields is a plus sign.
______15.The general form of a double displacement reaction is: element + compound-->element + compound.
______16.In balancing a chemical equation, it is permissible to change subscripts.