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Chemistry · L4 · Classifying reaction order by successive half-lives

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A decision path from comparing two consecutive half-lives measured on the same run — shrinking, constant, or growing — to the reaction order, as an alternative diagnostic to full linearization.

by @openstemUpdated Chemistry
Measure two consecutivehalf-lives from [A] vs t data1st half-life:time for [A]₀ to fall to [A]₀/22nd half-life:time for [A]₀/2 to fall to [A]₀/4Compare the two half-lives2nd half-life is SHORTER2nd half-life is the SAME2nd half-life is LONGERZero ordert½ = [A]₀ / (2k)First ordert½ = ln2 / kSecond ordert½ = 1 / (k[A]₀)shrinksconstantgrows

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