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Hydrogen peroxide decomposes via a pseudo-first order process, with a rate constant of...
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`2 H_2O_2 -> 2 H_2O + O_2`
`H_2O_2 -> H_2O + O_2`
`rate = k[H_2O_2] ->` pseudo first order reaction
`[A] = [A]_0 e^(-kt)`
if 90% will be decomposed, then:
`[A]_0 = 1`
`[A] = 0.10`
`k =1.15x10^-3 s^-1`
`[0.10] =*e^(-kt) `
`0.1/1 =e^(-kt) `
`ln(0.1) = -kt `
`-2.3026 = -(1.15x10^-3 s^-1) t `
`t = (-2.3026)/(1.15x10^-3 s^-1) `
`t = 2002 s `
`t = 2.0x10^3 s e conds `
Posted by jerichorayel on July 12, 2013 at 6:50 AM (Answer #1)
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