Average Reaction Rate
Factors Affecting Reaction Rate
Examples
Mystery Bag
100
The formula used to calculate average reaction rate.
change in[concentration]/change in [time]?
100
Three factors that affect the reaction rate of a chemical reaction.
What are concentration, surface area, and temperature?
100
Which of the 6 factors do you think is affecting this reaction?
Catalysts
100
What state of matter are all precipitates?
Solid
200
What, on the molecular level, causes chemical reactions occur in the first place.
Collision!
200
Why does temperature affect reaction rate?
It changes the kinetic energy of that substance, resulting in a faster or slower collisions.
200
The more _ there is, the faster plants can perform _.
light - photosynthesis
200
What is the difference between NaCl (aq) and NaCl (L)?
(aq) is salt dissolved in water, (L) is pure liquid (molten) salt
300
The factor that determines whether or not a collision will result in a reaction.
What is activation energy?
300
Why does concentration affect reaction rate?
This alters the amount of collisions taking place within a reaction.
300
Increasing pressure can increase the rate of reactions for what kind of substances?
Gas
300
What is an isotope?
Two elements with the same # of protons but different #s of neutrons.
400
What is the required activation energy for this reaction?
10 kJ
400
A substance that increases the speed of a chemical reaction.
What is an catalyst?
400
Decreasing volume of a gas will change this factor.
Pressure
400
What element has the highest electronegativity?
Fluorine
500
Supposing that there is a reaction between silver nitrate and potassium chloride, and given that there are .50 M of silver nitrate to begin and, after 10 seconds, there are .10 M of silver nitrate remaining, this is the average reaction rate of silver nitrate.
What is .04 mol/(L/s)?
500
This is a catalyst that exists in a state different from the substance it catalyzes.
What is a heterogeneous catalyst?
500
Think about activation energy... now think about how ammonia is made: combining hydrogen and nitrogen. Pretend you add hydrogen and nitrogen to a container to make ammonia. In terms of activation energy, why might the ammonia unbond to form hydrogen and nitrogen atoms again in that container.
The activation energy for the breakdown of ammonia is equal to that of creating ammonia.
500
What metal is a liquid a room temperature?
Mercury