[desperado182]

im doing a pseudo kinestics 1st order problem where rate = k [H]^x [AA] ^y and im having trouble figuring out the x and y values the formula that my professor gave was x = ln(k obs Run # / k obs run #)/ ln 2 and the same goes for y. i didnt really have any problems calculating the y value however im having trouble calculating x since the concentration is decreasing and so is the k obs i keep getting a negative number however that doesnt make sense when i calculate the k value and my lab manual says that the x and y values should be between .8 and 1.2 please help if you can



Run   [H+]   [AA+]   Kobs
1   .20 M   .0033 M   .0105
2   .20 M   .0066 M   .010
3   .20 M   .010 M   .018
4   .10 M   .020 M   .0189
5   .075 M   .020 M   .0106
6   .050 M   .020 M   .0095