Wrong questions Exam 1


Terms in this set (...)

What makes glycine different from other amino acids?
It is different because it is the only amino acid that has no chiral center. Therefore it has no optical activity.
What is a free radical?
A molecule that has unpaired electrons. This is what makes it very reactive.
What is the difference between an electrophile and nucleophile? Which attacks the other?
Electrophile: Electron loving molecule (lewis acid)
Nucleophile: Electron donating molecule (Lewis base)
They create a coordinate covalent bond when the nucleophile attacks the electrophile.
What are gringard reagents? How are they created?
They look like this: R'-Mg-X. These add the R group to another molecule. They act as nucleophiles. They are created by mixing R'-X(halide) and Mg in a solution of ether.
What is a bluterov synthesis and Strecker and Gabriel synthesis?
Butlerov synthesis creates sugars and Strecker and Gabriel synthesis create amino acids.
If a catalyst was added what would be changed in the graph?
Only the little "hill-tops" because these represent the transition state energy levels. (These activation energy levels can be changed). However the product and reactant energy levels cannot change because these represent entropy, heat, and Gibbs free energy. Kinetics will be changed but not thermodynamics (delta H) of the reaction.
What is rate constant?
The rate of a reaction simply sees how fast can be finished. Even though something may be thermodynamically favored it may take forever to happen. Now the kinetics tells you how long it takes. The rate can be measured by different equations: Arrhenious equation=Ae^-(Ea/RT). And by k[A][B]. Rate order is determined by adding the exponents of A and B. So for here it would be an order of 2. This means it would take two particles with the same orientation/activation energy bump into each other to create the products.
So if you had a problem asking you about the following.... "if you mixed Cu + AgNO3, what would be the product"?
The response would be Ag + CuNO3. This is because this is a single replacement reaction. This can be further classified as an oxidation/reduction reaction because silver gains an electron and copper looses an electron. They tend to be in aqueous solutions.
One mole of any gas at STP is at how many liters?
22.4 L