half life

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Ekayana Sethi 2K
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half life

Postby Ekayana Sethi 2K » Sun Mar 04, 2018 10:53 am

What does n half lives mean?

Dylan Davisson 2B
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Re: half life

Postby Dylan Davisson 2B » Sun Mar 04, 2018 11:58 am

"n" half lives just refers to how many half lives have occurred at any stage of the reaction in question. A half life occurs at the specific time when the current value of the concentration of reactants is halved. For example, after 2 half lives (n=2), the concentration of the reactants would be 1/4 the original concentration (1/2 * 1/2). After three half lives (n=3), the concentration of the reactants would be 1/8 the original concentration ( 1/2 * 1/2 * 1/2).

Allison Young 1K
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Re: half life

Postby Allison Young 1K » Mon Mar 05, 2018 1:28 am

A half-life is like a unit of time. For example, if the half-life of something is 2 hours, then 3 half-lives would be 6 hours. After that point 1/8th of the reactant would be left.

Abby Ellstrom 1I
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Re: half life

Postby Abby Ellstrom 1I » Mon Mar 05, 2018 10:38 am

'n' half lives refer to how many times the concentration has been halved at that point.

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