Chem Notebook COmplete

The Learning Goal for this section is: Explain how various factors, such as concentration,
temperature, and presence of a catalyst affects the rate of a chemical reaction.
You are going to answer these 15 questions first in the order they are given to you. This will be a quiz grade. You are then going to explain the
chemical concepts that are used in each question. You can do this in the order given or group them by concepts. You can use your book or information
found on the internet but all information must be written in your own word. The font needs to be Arial 12. This is due on Monday April 24 by midnight in
the drop box. This document should be a 6-page pdf.
1. B. 6. B. 11.A.
2. C. 7. B. 12.D.
3. C. 8. D. 13.C.
4. D. 9. A. 14.D.
5. A. 10.B. 15.D.
1 This graph represents the change in energy for two laboratory trials of the same reaction.
Which factor could explain the energy difference between the trials?
A Heat was added to trial #2.
B A catalyst was added to trial #2.
C Trial #1 was stirred.
D Trial #1 was cooled.
Chemical Concepts:
There are two main chemical concepts involved in this question and they are the “catalyst” and
“activation energy”. To start off, activation energy is known as the least amount of energy possibly
needed in order for a specific chemical reaction to take place. As it is evident in the graph trial #1
required a larger amount of energy in order to reach activation, thus, it can be said that it has a higher
activation rate than that of trial #2. This is where a catalyst comes into play, a catalyst is known as an
agent added into a reaction that causes the required activation energy to be lowered; therefore, the
reaction occurs at a faster rate and requires less energy.
2 Consider this balanced chemical equation:
Which will increase the rate of the reaction?
A increasing pressure on the reaction
B decreasing concentration of the reactants
C adding a catalyst to the reaction
D decreasing the temperature of the reaction
2H 2 O 2 (aq) → 2H 2 O (l) + O 2 (g)