Question

$\huge\fbox\pink{Question}$The time for half life period of a certain reaction A→products is 1 hour.When the initial concentration of the reactant 'A' is 2 mol/litre,how much time does it take for its concentration to come from 0.50 to 0.25 mol/litre if it is zero order reaction?​

Answer 1

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★0.25 hr

Given

• The time for half life period of a certain reaction A→products is 1 hour.

To find

• When the initial concentration of the reactant 'A' is 2 mol/litre,how much time does it take for its concentration to come from 0.50 to 0.25 mol/litre if it is zero order reaction?

Solution

★For a zero order reaction

$k = \frac{x}{t} - - - - - - - eq(1)$

★Where

• X = amount decomposed
• k = zero order rate constant

★For a zero order reaction

$k = \frac{[A] _{0}}{2t_{ \frac{1}{2} }}$

$since \: \\ = > [A] _{0} = 2M \: \\ = > t _{ \frac{1}{2} } = 1hr \\ = > k = 1$

★From eq(1)

$t = \frac{0.25}{1} = 0.25hr$

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Answer 2

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The time for half life period of a certain reaction A→products is 1 hour.When the initial concentration of the reactant 'A' is 2 mol/litre,how much time does it take for its concentration to come from 0.50 to 0.25 mol/litre if it is zero order reaction?

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