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Measuring Rates of Reaction
Factors Affecting Rate of Reaction
Collision Theory
Catalyst
Chem 11 Misc.
100

Define the term "rate of reaction"

The decrease in the concentration of reactants per unit time or the increase in the concentration of product per unit time

100
Name 3 factors that affect rate of reaction
Temperature, concentration, particle size, pressure, catalyst
100
What is temperature a measure of?
The average kinetic energy of particles in a substance
100
What is a catalyst?
A substance which speeds up the rate of a reaction while not being consumed
100

What is the number of atoms in a molecule expressed as the simplest ratio?

Empirical formula

200

What is "the rate of reaction"?

change in observable quantity from a reaction per unit time 

200
How does a catalyst affect rate of reaction?
Catalysts lower the activation energy of a reaction
200
What does a Maxwell-Boltzmann distribution curve illustrate?
The range in values of the kinetic energy of particles
200
What is an enzyme?
A catalyst that controls biological reactions
200

What is the reactant that is not used up completely in a reaction?

The excess reactant

300
Name 3 of the 6 ways to measure rate of reaction
Change in volume, change in mass, change in transmission of light, change in concentration using titration, change in concentration using conductivity, clock reaction
300

What is the relationship between temperature and the average kinetic energy of particles?

Temperature is directly related to the average kinetic energy of particles; if temperature increases, the average kinetic energy increases

300
What does the area under the Maxwell-Boltzmann distribution curve represent?
The total amount of particles in the sample
300
What effect does a catalyst have on activation energy?
Catalysts lower the activation energy
300

How does electronegativity change across a period?

Increases

400

Name one device that can be used to measure the change in transmission of light

Spectrophotometer

400

Why does increasing the concentration of reactants increase the rate of reaction?

As concentration increases, the frequency of collisions between reactant particles increases, so that the frequency of successful collisions increases too

400
What two factors affect the success of reactant particle collisions?
The energy of collisions and the geometry of collision
400

How do catalysts affect the reverse reaction rate?

Speed up reverse rate as well.

400

How do you calculate % yield?

Actual Yield / Theoretical yield x 100%

500

What does the total electrical conductivity of a solution depend on?

The total concentration of its ions and their charges

500

What effect does increasing the average kinetic energy of reactant particles have on the Maxwell-Boltzmann distribution curve?

The peak of the curve shifts to the right

500

Why is kinetic energy necessary with respect to collision theory?

The energy is necessary to overcome the repulsion between molecules and often to break some bonds in the reactants before they can react

500
How do catalysts affect the yield of a reaction?
They don't
500
What is an electrolyte?
This is a liquid that conducts electricity and undergoes chemical change as a result