CHEM 112 Chapter 14: Section 14.3

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redant354

31 Jan 2019

School

UMASS-Amherst

Department

Chemistry

Course

CHEM 112

Professor

Prof. Scott M. Auerbach

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Document Summary

Rate law: shows the quantitative relationship between reaction rate and the concentration of species involved in the chemical reaction. Catalyst(c): species that speeds up the rate of a chemical reaction but does not undergo any permanent chemical change aa+bb cc products. Rate laws consist of three main components. The order of the reaction with respect to the reacting species. Rate constant for a reaction is given by the symbol k. Rate law includes the concentrations of reacting species in moles per liter or pressure units. Reaction order: expresses the order of the reaction with respect to each reactant. Shows the effect a reaction species has on the rate of the reaction. Indicated by the exponents x, y, and z in the general rate law given previously. Overall reaction order is the sum of the individual reaction orders rate=k[a]^x[b]^y[c]^z. 14. 3b determining rate law using the method of initial rates.

Related Questions

The rate of a chemical reaction depends on the concentrations ofthe reactants. For the general reaction between Aand B,

aA+bB?cC+dD

The dependence of the reaction rate on the concentration of eachreactant is given by the equation called the rate law:

rate=k[A]m[B]n

where k is a proportionality constant called the rateconstant. The exponent m determines the reaction orderwith respect to A, and n determines the reaction orderwith respect to B. The overall reaction order equals the sum of theexponents (m+n).

For the reaction A+B+C?D+E, the initial reaction rate wasmeasured for various initial concentrations of reactants. Thefollowing data were collected:

Trial	[A] (M)	[B] (M)	[C] (M)	Initial rate (M/s)
1	0.40	0.40	0.40	1.2

For the reaction A+B+CâD+E , the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected:

Trial	[A] (M )	[B] (M )	[C] (M )	Initial rate (M/s )
1	0.20	0.20	0.20	6.0Ã10^â5
2	0.20	0.20	0.60	1.8Ã10^â4
3	0.40	0.20	0.20	2.4Ã10^â4
4	0.40	0.40	0.20	2.4Ã10^â4

The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction between A and B ,

aA+bBâcC+dD

The dependence of the reaction rate on the concentration of each reactant is given by the equation called the rate law:

rate=k[A]^m[B]^n

where k is a proportionality constant called the rate constant. The exponent m determines the reaction order with respect to A , and n determines the reaction order with respect to B . The overall reaction order equals the sum of the exponents (m+n ).

Part A

What is the reaction order with respect to A ?

Express your answer as an integer.

Part B

What is the reaction order with respect to B ?

Express your answer as an integer.

Part C

What is the reaction order with respect to C ?

Express your answer as an integer.

CHEM 112 Chapter 14: Section 14.3

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