Transition Metals
Story Time
Exo/Endo Rxns
Le Chatelier's
Redox Reactions
100
In the M&M lesson, the M&Ms represented __________.
electrons
100
What did the 12 students in Switzerland learn about in the story?
Exothermic and Endothermic reactions
100
DOUBLE POINTS!
The reaction that gives off heat.
Exothermic
100
Define a reversible reaction.
The conversion of reactants to products occurs simultaneously with the conversion of products to reactants
100
Which group on the Periodic Table usually forms a charge of -1? Give the group name.
Halogens
200
The vocabulary word meaning "able to be stretched"
Ductile
200
The reason why one of the cups was HOT and the other was COLD.
Different salts were added to the water, and produced or absorbed heat.
200
A ________ works by __________ the activation energy in a reaction. A _______ is a naturally-occurring catalyst.
Catalyst, lowering, enzyme
200
DOUBLE POINTS!
A state in which the forward reaction rate equals the reverse reaction rate.
Dynamic Equilibrium
200
The total number of electrons that an atom either gains or loses in order to form a chemical bond.
Oxidation Number
300
What is meant by a "sea of electrons"?
Transition metals have free-floating electrons that act as water in-between the atoms. This allows for electricity to flow.
300
Who said it?
"Umm... I thought salt was called Sodium Chloride.. ya know...like... NaCl?"
Lincoln
300
Tell whether the following reaction is endo/exo thermic.
Endothermic
300
The position of equilibrium would shift to the ________ if [A] increased.
A + 2B ⇌ C + D
RIGHT
300
DOUBLE POINTS!
Name 3 elements that really want to get rid of 2 electrons.
Be, Mg, Ca, Sr, Ba, Ra
400
DOUBLE POINTS!
The anode has a ______ charge, and the cathode has a ________ charge.
Anode = positive
Cathode= negative
400
Who said it?
"Woah! My cup is really hot!"
Jonah
400
In our experiment in class, what two reactants were mixed together to create an exothermic reaction?
Yeast and Hydrogen Peroxide
400
What are three ways we could shift the position of equilibrium to the left?
A + 2B ⇌ C + D + 260kcal
Decrease the Pressure
Increase C or D, Decrease A or B
Heat the Reaction System
400
What is the oxidation number of oxygen in the following molecule?
0. Remember Rule #2!
500
Name 3 types of bonding, and define each one.
Ionic bonding-- a transfer of electrons. The bond is created because of a difference in electrical charge.
Covalent bonding-- a sharing of electrons.
Metallic bonding-- a sea of electrons, with a lattice structure of metal atoms.
500
Who said it?
"Yeah I already know that salt is a solute when you dissolve it in water, and water is known as the universal solvent and--"
Ada
500
Draw an Endothermic Reaction Graph on the board. Must include axis titles and labels.
Answer varies.
500
If I had 7 moles of gummy bears, how many gummy bears would I have?
4.215 x 1024 gummy bears
500
What is the oxidation numbers of each element in the following compound?
S: +2
O: -2