Reaction Rates
Endothermic reactions _______ energy.
Exothermic reactions _________energy.
Take in/absorb
Give off/ release
A + B= AB
What type of reaction has taken place?
Synthesis
An Ionic bond forms between a _______ and a ____.
Metal and nonmetal
A cation holds a _____________ charge.
Positive
The left hand side of a chemical equation is called the __________, while the right hand side of a chemical equation is called the _____________.
Reactants
Products
What do catalysts do?
Speed up a reaction
AB--> A + B
What type of reaction has taken place?
Decomposition
A covalent bond forms between a ________ and a _________.
nonmetal, and nonmetal
An anion holds a ____________ charge.
Negative
Should you ever change the subscripts in a chemical equation? WHY...
No
You will show that you are taking away, or adding more atoms to the equation
As temperature increases, what happens to the reaction rate?
It speeds up
Combustion produces __________and ________, in the presence of oxygen.
What is unique about a polar bond?
Unequal sharing
Name a cation that has a 1+ charge.
Anything from group 1 on the PTE.
Do catalysts ever get used up?
No
As stirring increases, what happens to the reaction rate?
The reaction rate speeds up
AB+ C--> AC + B
What type of reaction is taking place?
Name two elements that would form a ionic bond.
TBD by Mrs. Ames
Name an anion that has a 1- charge.
Anything from group 17 on the PTE.
What should you change in a chemical equation to balance the equation?
The coefficients
Name 3 of the 5 factors that affect reaction rates.
Stirring, Catalysts, Concentration, Surface Area and Temperature
AB + CD--> AC + BD
What type of reaction is taking place?
Double Replacement
Name two elements that would form a covalent bond.
TBD by Mrs. Ames
A cation has a positive charge because it is ___________ its electron.
An anion has a negative charge because it is ___________________ an electron.
giving away
accepting
What does the " -->" in a chemical equation mean?
"Yields"