half lives Flashcards

1
Q

what is meant by half life?

A

time taken for concentration to halve

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2
Q

give 2 examples of when half life is constant

A
  • radioactive decay
  • pharmacokinetics of some drugs
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3
Q

describe the half life of a first order reaction

A

remains constant

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4
Q

describe the half life of a second order reaction

A

increases as concentration decreases

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5
Q

describe the half life of a zero order reaction

A

decreases as concentration decreases

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