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Enzyme Catalysis

If A and B ar...

Question

If A and B are two different chemical species undergoing 1st order decomposition with rate constant Ka and Know which are in the ratio 3:2 in magnitude. If the initial concentration of A and B are in the ratio 3:2 .What would be the concentration of A and B after three half lives of A

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Solution

A’s Half life = 2 years {let}
B’s Half life = 3 years {let}
After 3 half lives =>
Concentration of A = A/8 and time taken = 2*3 = 6 years.
B will be B/2 at 3 years and after 6 years it would be B/4
Ratio = (A/8)/(B/4) = > 3/4

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