Question

The radioisotope studies today decays following either zero order or first order, or second order kinetics....

The radioisotope studies today decays following either zero order or first order, or second order kinetics. The graphs produced by the integrated rate law plot different variables on the x and y axis depending on the order of the reaction. Look up in your textbook for the straight line plots of these three types of rate laws. Draw the plots in your notebook and label it. Give an equation that can be use to determine the half life of the radioisotope.

This is a Chemistry 1046 question..

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Answer #1

Shown below are the straight line plots,

zero-order reaction : [concentration] vs time

first-order reaction : ln[concentration] vs time

second order reaction : 1/[concentration] vs time

[concentration] represents the amount of substrate remaining at time t

k = rate constant

Half life for,

zero-order reaction : t1/2 = initial [concentration] of substrate/2k

first order reaction : t1/2 = 0.693/k

second order reaction : t1/2 = 1/k x iniitial [concentration] of substrate

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