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Unformatted text preview: • Determine concentration at any time • d[A]/dt = k[A] • [A] = [A o ]ekt e = 2.78 e1 = 1/2.78 = 0.37 • Log (10) = 1 ln(e) = 1 • Ln[A(t)] = ln{[A o ]ekt } • ln(xy) = ln(x) +ln(y) • Ln[A(t)] = ln[A o ] +ln(ekt ) = ln[A o ] –kt • y = b + mx straight line • Y = ln[A(t)] b = [A o ] m = k x = t • Ratio method 1 st order • Rates R 1 =  kc 1 • R 2 =  kc 2 • R 2 /R 1 = {c 2 /c 1 } 1 • R 1 = 2M c 1 = 1M • R 2 = 4M c 2 = 2M • (4/2) = (2/1) 1 so 1 st order • Half Lives First order • c 1 = 2M t 1/2 = 5s • C 2 = 4M t 1/2 = 5s • {t 1/2 (1)/t 1/2 (2)} = (c 2 /c 1 ) n1 n1 = 0 for 1st...
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 Spring '09
 DR.BRENNAN
 Chemistry, Chemical reaction, Rate equation

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