[myalpineshines]

Okay i am going crazy because i cant figure out how to do this because my teacher for AP chem sucks.

"the decomp. of hydrogen peroxide was studied, and the following data are obtained at a particular temp:
Time (s)          [H2O2] (mol/L)
120                   1.00
300                    .91
600                    .59
1200                  .37
1800                  .22              
2400                  .13
3000                  .082
3600                 .050

Assuming that   Rate= change in [H2O2]/change in t
"determine the rate law, inegrated rate law, and the value of the rate constatnt.  Calculate the [H2O2] at 4000s after the start of the reaction"

i did awesome in chem 1 and i cant figure out for the life of me how to do this. please *delete me*!!!!!!!!!!!!! what do i do??
 

[Mitch]

Please do not post in CAPS and please spell check your posts in the future.

Try making a graph of the listed data using Excel, and see what you can get from that.

[myalpineshines]

okay i can make the graph in my calc and my teacher was saying something about doing linear regression, then looking at the r squared value....but i dont know what to do with it.

[Mitch]

Have you done the linear regression? What is the R squared value? The closer the Rsquared value is to 1 the better the fit of the regression line to the actual data is.

[sdekivit]

the rate law is a differential equation. You can rewrite this and then integrate both sides to get a normal equation. Then use A(t) = 1/2 * A(0) and substitue this to find the expression for the half life and thus you can calculate k.