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Teachers & SchoolsAP Chemistry 1.4 Chemical Reaction Rates. What are the correct units for a second order rate constant?

AP | AP Chemistry |

AP Chemistry | Chemical Reaction Rates |

Language | English Language |

Test Prep | AP Chemistry |

is the correct units for a second order rate Constant

and your potential answers All right You know i get

asked that a lot of cocktail parties Okay well this

problems asking about the units for a rape constant but

there's a catch It doesn't give us the equation for

the rate law told so let's start by writing the

reaction rate law equation right there Rika rate law tells

us the reaction rate as a function of the rate

constant in the concentration of the reactant way don't know

what the reactant are but we do know that the

reaction is second order it's hoping to make the order

of the phoenix by the end of the year But

you don't have to put in it's time for us

Okay so the reaction order refers to the exponents on

the concentrations of the reacting species in the rate law

If we have only one reactant a then the concentration

of a must be squared in this equation Well the

question asked us to find the units on the rape

constant k Unfortunately we're given the units for the other

terms in the equation Good thing we wore our lucky

underwear today All right so here's the trick Since the

concentration of a is squared the units on a mole's

per leader are also squared After that all we have

to do to find the units on k is a

little math We have to isolate the unknown then group

the same units together and cancel out terms by term

correct units for the rate constant our leaders per mall

for second which is answer c Now how would you

rate that constant We'd give it five girl and meyer 00:01:48.966 --> [endTime] flasks