2020 Mod 14

Question 1

It’s tomorrow if you want to react together to form new chemicals, what is the first thing that must happen

Answer 1

The molecules must collide with each other so they can exchange or transfer electrons

Question 2

The chemist runs a reaction a low temperature and then run the same reaction again at a higher temperature which reaction will run faster

Answer 2

The second with the higher temp

Question 3

Explain in your own words why rate of why the rate of a chemical reaction increases with increasing react concentration

Answer 3

The rate increases because the molecules in a higher concentration are closer together and therefore have more opportunities to collide with each other

Question 4

Your chemistry book with the rate constant for two different reactions. The first rate constant is 0.12 1/s And the second is 34.5 1/ M•s. Even though the rate equations for these reactions are not given an astute student says that the overall order of these two chemical agents must be different from each other. In addition, the student says that the second reaction is faster than the first if the concentration of the reactants are roughly the same. Why can a student make the statements

Answer 4

Because the units in the second match the equation unit and therefore skip the step that the first equation has to do

Question 5

The order of a chemical equation reaction with respect to one of the three accidents zero. If you double the concentration of that reaction what will happen to the rate?

Answer 5

Nothing it will not change

Question 6

Your student is studying a chemical chemistry book and read that for the following reaction:

CH3Cl + NaF -> CH3F + NaCl

The rate equation =

R = k[CH3Cl][NaF]

The student look at the rate reaction equation and says that since the temperature does not appear in the right equation, the rate of the season reaction is obviously not affected by temperature. Is this incorrect? Why or why not?

Answer 6

No. The rate constant depends on temperature there for the Rate depends on temperature

Question 7

What do we call a chemical that increases the rate of a chemical reaction without getting used in the process

Answer 7

Catalyst

Question 8

A chemist studies two different reaction in finder the activation energy for the first is significantly higher than the reaction to. Assuming the three-year didn’t concentrations are roughly the same in the reaction what his reaction is the fastest

Answer 8

The second

Question 9

What is the main difference between a heterogeneous catalyst in a homogeneous catalyst

Answer 9

The big difference is between whether or not the catalyst has a faith that is in the reaction or not

Question 10

What is the purpose of a catalytic converter in an automobile

Answer 10

It’s purpose is to help the reaction Inside of the car so that monoxide is not created in instead the harmless gas of carbon dioxide is

Question 11

What is Reaction rate

Answer 11

The rate of change of product in a chemical reaction

Question 12

What is the reaction rate in math medical terms

Answer 12

Are equals Delta product over delta T equals negative Delta reactant over Delta T

Question 13

What do we call the study of reaction kinetics

Answer 13

It is when we study how fast a reaction proceeds

Question 14

What is a controlled experiment

Answer 14

In a controlled experiment a test is done under normal conditions and then all other tests are compared to the standard conditions

Question 15

What is the test of an experiment under normal conditions referred to?

Answer 15

Control

Question 16

What must happen for chemicals to react?

Answer 16

Do you react, chemicals must collide with one another so if their elections can be either transferred or rearranged

Question 17

What and why increases chemical reaction rate?

Answer 17

Higher temperature increases chemical reaction rates because the reactant molecules or Adams move faster, increasing the chance for a collision

Question 18

What happens when you decrease the concentration of a chemical reaction

Answer 18

Decreasing the concentration decreases the chemical reaction rate because they are fewer reactant molecules or Adams to collide with one another

Question 19

What will happen if you increase the surface area of a reactant and why

Answer 19

Increasing the surface area of a reactant increases the reaction rate because the molecules or Adams of the reactant can more easily mingle with them all or Adams of the other reactants

Question 20

What is a mathematical equation that we call Rate equation

Answer 20

R = k[A]^x[B]^y

Question 21

What do the letters represent an equation 14.2

R = k[A]^x[B]^y

Answer 21

In this equation, R represents the rate of the chemical reaction, [A] represents the concentration of reactant A, [B] stands for the concentration of reactant B, and K is called the rate constant for that chemical reaction. the letters X and Y represent the exponent for the concentration of the reactants

Question 22

What happens if we add X and Y together

Answer 22

We will get the overall order of the chemical reaction

Question 23

What happened to the rate of a chemical reaction if the exponent of the rate equation is zero for that reactant

Answer 23

The rate of the chemical reaction will be unaffected by the concentration of the reactants when it’s exponent is zero

Question 24

How much reaction rate orders for a chemical reaction be determined? Are they equal to the stoichiometric coefficients in the chemical equation?

Answer 24

The reaction rate order for a chemical reaction must be determined experimentally: they are not equal to the stoichiometric coefficients in the chemical equation

Question 25

Do chemical reactions ever actually finish?

Answer 25

No, chemical reactions never actually finish. They just keep getting slower and slower until they proceed in perceivably slow. This means that for any chemical reaction no matter how long we wait, there will always be some reactants left.

Question 26

Is the reaction rate depending on temperature? And what is it determined by

Answer 26

The temperature dependent of reaction rate is determined by the variation of the Rate constant with temperature. Since the rate constant increases dramatically with increasing temperature the reaction rate does as well.

Question 27

At what rate does do chemical reactions increase with temperature

Answer 27

The rate of many chemical reactions double for every 10°C increase in temperature

Question 28

What was the behavior of the catalyst that was demonstrated in the experiment?

Answer 28

Catalyst speed up reaction rate without actually getting used up in the chemical reaction

Question 29

What happens to a reaction rate if we decrease the activation energy

Answer 29

Decreasing the activation energy of a a reaction increases its rate

Question 30

How do you catalysts speed up reaction rates?

Answer 30

Catalysts speed up the reaction rate by lowering the activation energy of the reaction

Question 31

Heterogeneous catalysts

Answer 31

Catalyst that are in a different phase than the reactants

Question 32

Homogeneous catalysts

Answer 32

Catalyst that have the same phase as at least one of the reactants

Question 33

Reaction mechanism

Answer 33

Hey series of chemical reactions that till the step-by-step process by which a chemical reaction occurs

Question 34

Do the units for the rate constant vary? What do they depend on?

Answer 34

The units for rate constant vary. They depend on the exponent of the rate equation

Question 35

What is instantaneous rate

Answer 35

The instantaneous rate is the rate for the concentration we used at one instant in time in the next second the rate will be lower because the concentration of the reactants is lower