Calculating Slope (-k) and Intercept (lnNo)
from Decay Data
2. Using any x,y pairs, calculate the slope.
slope = dy/dx = 6.4019 - 8.6706 = -2.2687 = -0.1260 (min-1)
20.00 - 2.00 18.00
3. Find the decay constant, k = -slope = +0.1260 min-1
1. Calculate the ln of each activity
in the data set, since the straight
line is a plot of lnN = lnNo - kt
slope = -k
intcpt. = lnNo
Data
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