Elements, Compounds, and Mixtures
Balancing Chemical Equations
Stoichiometry and Percent Yield
Energy Diagrams
Acids, Bases, and pH Calculations
100
An element is a type of _______, and is defined by its number of ________.
What is an atom and protons?
100
The large numbers in italics below represent the number of each _________.
2H2O2 ------> 2H2O + O2
What is a molecule?
100
When you divide actual yield by theoretical yield you get this figure which tells you how successful your chemical reaction was.
What is percent yield?
100
This term describes the energy stored in the chemicals before the reaction starts.
What is the potential energy of reactants?
100
These products are made from the reaction of an acid and a base.
What are salt and water?
200
A compound is when at least two different _______ are chemically bound.
What are elements?
200
Fill in the blank below:
__Fe + 2O2 -----> Fe3O4
What is three?
200
We use this term, which is defined as a certain number of atoms, to convert from one mass in a chemical equation to another mass.
What is a mol?
200
This term describes the energy required to start a reaction.
What is the energy of activation, or activation energy?
200
Bases are _______ 7 on the pH scale.
What is above?
300
Mixtures are when substances intermingle but are not ______________.
What is chemically bound?
300
When a chemical equation is balanced it will have the same number of _______ of each ________ on either side of the arrow.
What are atoms and element?
300
Convert this mass of Copper into moles.
127g Cu
What is 2 moles?
300
This term describes the difference between the potential energy of the reactants and the potential energy of the products.
What is "change in heat" or "delta H"?
300
This term adds to pH to make 14.
What is pOH?
400
All ___________ are molecules but not all molecules are __________.
What are compounds?
400
Fill in the blanks:
__AlCl3 -----> __Al + __Cl2
What are 2, 2, and 3?
400
Convert 4 moles of O2 gas into grams.
What is 128 grams?
400
The green line represents this important amount of energy in a chemical reaction.
What is activation energy?
400
Acids are ________ donators, while bases are ________ acceptors.
What is hydrogen or proton?
500
This photo is best described as a ________.
What is a mixture?
500
Fill in the blanks:
__HNO3 + __Ba(OH)2 -----> ___H2O + __Ba(NO3)2
What are 2,1,2,1?
500
2H2O2 -----> 2H2O + O2
If I run this reaction and get out 32g of O2, how much H2O2 did I react if the reaction ran with 100% yield?What is 68 grams?
500
In an exothermic reaction, these three amounts of energy will add up to the total potential energy of the activated complex.
What are the potential energy of the products, the delta H, and the activation energy?
500
This number represents the concentration of [OH-] if the concentration of [H+] is 0.0000065.
What is 0.00000000155 or 1.55x10^-9?