Homework Answers
Factors affecting rate of reaction are:
1.Temperature
2.Nature of reactants
3.Contact between reactants
4.Concentration of reactant
5.Catalyst
If the reaction rate doubles when the concentration of reactant is doubled then it is First order with respect to that reactant. .
The term half life is the time taken for the concentration of reactant to decrease by a factor of 1/2
For KBrO3
Oxidation no. of K = +1
Oxidation no. of Br = +5
Oxidation of O = -2
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Reaction Rates Assessment Question 04 Select all of the factors which affect the rates of chemical...
(a) Select all of the correct statements about reaction rates from the choices below. The lower...
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The fastest step in a reaction is called the rate-determining step. A balanced chemical reaction is necessary to relate the rate of reaction to the concentration of a reactant. Reactions involving very unstable combinations of chemicals have large rate constants. Catalysts increase reaction rates. Reaction rates increase as reactant concentrations decrease. Solid...
1. which of the factors that affect chemical reaction rates explains why milk spoils slower when...
1. which of the factors that affect chemical reaction rates explains why milk spoils slower when stored in the refrigerator? a. ctalyst b. temperature c. Concentration d. Surface area 2, The arte of a chemical increases with increasing concentrations of reactants because reactant molecules move faster when they are more concentrated a. True b. False
Part 1.) Select all of the correct statements about reaction rates from the choices below. 1....
Part 1.) Select all of the correct statements about reaction rates from the choices below. 1. The lower the rate of a reaction the longer it takes to reach completion. 2. As a reaction progresses its rate goes up. 3. Catalysts decrease reaction rates. 4. A balanced chemical reaction is necessary to relate the rate of reaction to the concentration of a reactant. 5. Reaction rates increase as concentrations of homogeneous catalysts increase. 6. The higher the rate of a...
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction...
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The rate of a slow step has more effect on the overall reaction rate than the rate of a fast step. As a reaction progresses its rate goes down. Concentrations of homogeneous catalysts have no effect on reaction rates. Reaction rates always increase as masses of solid reactants increase. The fastest step...
4. -10.1 points 0/4 Submissions Used (a) Select all of the correct statements about reaction rates...
4. -10.1 points 0/4 Submissions Used (a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. Reaction rates decrease with increasing temperature. Catalysts increase reaction rates. O Reaction rates can show little change as masses of solid reactants increase. Catalysts decrease reaction rates. Reaction rates increase as concentrations of homogeneous catalysts increase. Slow reactions can be speeded up by raising the temperature.
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant...
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant concentration C) A catalyst D) Temperature, reactant concentration, and a catalyst 13.) A fast reaction rate for a chemical reaction is dependent on: A) having a large activation energy B) having a small activation energy C) being exothermic D) being endothermic 14.)) A catalyst is A) a substance that decreases the energy of the products. B) a product in a chemical reaction. c) a...
Estimate the k for this reaction. (Last question on sheet) D'Youville College Chemistry 115 - Problem...
Estimate the k for this reaction. (Last question on
sheet)
D'Youville College Chemistry 115 - Problem Solving Chemistry Updated Spring 2016 Page 8 Half-lifes and order of reaction. The "reaction order" describes the dependence of rate on the concetration of a reactant. If the reaction is oth order, it's rate is independent of concentration, if it is 1st order, the rate is directly related to the concentration (ie. if the concentration is doubled, the rate will double), and if it...
2. When using the method of initial rates to determine the reaction order of each individual...
2. When using the method of initial rates to determine the reaction order of each individual reactant, why must data only be used in which one reactant is changing concentration but not the other reactants? 3. Briefly explain why the number of total drops being mixed in each experiment is kept constant throughout all five experiments. 4. Sketch a molecular‐level picture that illustrates why reaction rate increases when the concentration of a reactant is increased. Note – this might be...
can you do the 6-12 number 8 is multiple choice 6. The initial rates listed in...
can
you do the 6-12 number 8 is multiple choice
6. The initial rates listed in the table below were determined for the reaction CO(g) + NO2(g) + CO2(g) + NO(g) at varied concentration of the reactants, CO and NO2. Determine the rate law of this reaction. Experiment Initial [CO] (mol/L) Initial [NO] (mol/L) Initial rate (mol/Ls) 5.0x10+ 3.5x10 3.4x10-8 5.0x10+ 7.0x10- 6.8x10-8 1.5x10 3.5x10 1.02x10-7 7. The half-life of the reaction C&H:(8) ► 2CH.g) at constant temperature is independent...
Kinetics Broadly speaking, the factors that influence chemical reaction rates may be summarised as follows. Chemical...
Kinetics Broadly speaking, the factors that influence chemical reaction rates may be summarised as follows. Chemical nature of reactants (Is the chemical reaction thermodynamically "downhill so that it can occur spontaneously at all?) Reactant Concentration (or pressure for a gas) Physical state of reactants (e.g. phase, or surface area of solids) Presence of catalyst Temperature 012 For each offervations, identify which one these five factors is most important, and briefly explain how/why that is the case. (a) The ability to...
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The rate of a slow step has more effect on the overall reaction rate than the rate of a fast step. As a reaction progresses its rate goes down. Concentrations of homogeneous catalysts have no effect on reaction rates. Reaction rates always increase as masses of solid reactants increase. The fastest step...
4. -10.1 points 0/4 Submissions Used (a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. Reaction rates decrease with increasing temperature. Catalysts increase reaction rates. O Reaction rates can show little change as masses of solid reactants increase. Catalysts decrease reaction rates. Reaction rates increase as concentrations of homogeneous catalysts increase. Slow reactions can be speeded up by raising the temperature.
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant concentration C) A catalyst D) Temperature, reactant concentration, and a catalyst 13.) A fast reaction rate for a chemical reaction is dependent on: A) having a large activation energy B) having a small activation energy C) being exothermic D) being endothermic 14.)) A catalyst is A) a substance that decreases the energy of the products. B) a product in a chemical reaction. c) a...
Estimate the k for this reaction. (Last question on
sheet)
D'Youville College Chemistry 115 - Problem Solving Chemistry Updated Spring 2016 Page 8 Half-lifes and order of reaction. The "reaction order" describes the dependence of rate on the concetration of a reactant. If the reaction is oth order, it's rate is independent of concentration, if it is 1st order, the rate is directly related to the concentration (ie. if the concentration is doubled, the rate will double), and if it...
can
you do the 6-12 number 8 is multiple choice
6. The initial rates listed in the table below were determined for the reaction CO(g) + NO2(g) + CO2(g) + NO(g) at varied concentration of the reactants, CO and NO2. Determine the rate law of this reaction. Experiment Initial [CO] (mol/L) Initial [NO] (mol/L) Initial rate (mol/Ls) 5.0x10+ 3.5x10 3.4x10-8 5.0x10+ 7.0x10- 6.8x10-8 1.5x10 3.5x10 1.02x10-7 7. The half-life of the reaction C&H:(8) ► 2CH.g) at constant temperature is independent...
Kinetics Broadly speaking, the factors that influence chemical reaction rates may be summarised as follows. Chemical nature of reactants (Is the chemical reaction thermodynamically "downhill so that it can occur spontaneously at all?) Reactant Concentration (or pressure for a gas) Physical state of reactants (e.g. phase, or surface area of solids) Presence of catalyst Temperature 012 For each offervations, identify which one these five factors is most important, and briefly explain how/why that is the case. (a) The ability to...
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