Finding rate constants and order with excel 2013 - Real Chemistry

In this video you will learn how to plot the concentration of reactants vs time to determine the rate order and rate constant of a chemical reaction. This is accomplished by using integrated rate laws. For example, if a plot of concentration vs time is linear, then the reaction is a zeroth order reaction and the slope of the best fit line is the rate constant (times negative 1). If a plot of the natural log of concentration vs time is linear, then the reaction is first order and the slope is once again the rate constant (times negative 1). Lastly, if the plot of one over concentration vs time is linear, then the reaction is second order and the rate constant is the slope (not negative in this case).

[kellyryan]

This was EXACTLY everything I needed to know for my lab

[senudarajapakse]

This is an excellent video. You explained it way better than my professor

[aaronhorta]

Yes, I have a question. Lets say in the data, the last 2 intervals where time continues but the concentrations stay the same value. Can we neglect those 2 intervals in order to determine the the rate constant and to form a straight line? Since those two intervals would make the line of the graph horizontal.

[barbarawilk]

What to do when we are not sure? When we do not have "perfect match"? Should we count and use another method?

[noone-jskb]

Is it necessary to convert time in seconds instead of minutes???

[Salvador_Dali]

thank you! :) is there a way to identify easily higher order kinetics or fractions order kinetics as well?
cheers

[Saishin]

hi, i have a question if the equation on the chart gives negative value of y, that means the value of k will be negative? if yes then if it follows zero or first order reaction then K of will get positive or remain negative as minuc*minus =plus, please explain