Vocab
Describing Chemical Reactions
Chemical Equations
Types of Reactions
Misc
100
The substances formed in a chemical reaction are called what?
Products
100
What does the arrow in a chemical reaction mean?
Yields
100
Chemical equations must satisfy the law of conservation of mass. What does this mean?
Atoms cannot be created or destroyed in a chemical reaction
100
In what reaction do two or more substances combine to form a new compound?
Ex.
A + X --> AX
Synthesis Reaction
100
The decomposition of a substance by an electric current is called what?
Electrolysis
200
The original substances in a reaction are called what?
reactants
200
Give two examples of physical indicators in a chemical reaction
Energy release
Color Change
Gas Formation
Precipitate
200
Balance this reaction
H2+O2 ---> H2O
2H2+O2 ---> 2H2O
200
In what reaction does a substance combine with oxygen, which releases a large amount of energy in the form of heat and light?
Combustion reaction
200
Chemists do not write 1 in equations because they are what?
Lazy
300
A solid that forms during a chemical reaction in a solution and separates from the solution is called what?
Precipitate
300
What do the symbols (s), (l), and (aq) mean?
Solid, liquid, and aqueous
300
_Al+_Fe3N2 --->__AlN+__Fe balance this equation
2Al + 1Fe3N2 ---> 2AlN + 3Fe
300
What reaction occurs when one element replaces a similar element in a compound?
Ex.
A + BX --> AX + B or Y+ BX ---> BY+X
Single-Displacement Reaction
300
The small whole number that goes in front of a formula in a chemical equation is called what?
Coefficient
400
What kind of equation uses chemical formulas and symbols
Formula equation
400
What does this symbol represent?
A reversible reaction
400
What kind of equation uses reactants and products written down in words.
Word equation
400
In what kind of reaction does a single compound produce two or more simpler substances?
Ex.
AX ----> A + X
Decomposition reaction
400
What does this symbol mean?
Reactants are heated
500
What is a chemical equation?
A way of showing the results of a chemical reaction using symbols and formulas
500
What are the requirements for a good chemical equation?
1. The equation must represent known facts
2. The equation must contain the correct formulas for reactants and products
3. The law of conservation of mass must be satisfied.
500
__ZnS+__AlP --> __Zn3P2+___Al2S3 Balance this equation.
3ZnS+2AlP --> 1Zn3P2+1Al2S3
500
In what kind of reaction do the ions of two compounds exchange places in an aqueous solution to form two new compounds?
Ex.
XA + YB --> XB + YA
Double-displacement reaction
500
Write the formula equation for the following word equations.
Solid sodium reacts with chlorine gas to produce sodium chloride crystals.
Na (s) + Cl (g)→ NaCl (s)