Sucrose inversion, optical rotation calculation

timer Asked: Mar 9th, 2016

Question description


I have a problem with  a sucrose inversion related task. I have done the practical part of the task, and measured the optical rotations at the given time intervall.

At the 0. point it was 20,15°, the goal was to determine the Pseudo-first order reaction rate constant. I was able to calculate that by making a graph of my ln(Θt-Θ∞) (Θt - the optical rotation at a given time, Θ∞ - optical rotation when the reaction is finished) datas vs time ot measurement, it's slope multipled by -1 was, based on the equation on the image.

I have to calculate the value of Θ0 too, by the same equation based on the intercept of the line. How do i do that?

My Θ∞ value is -6,25° and the intercept based on excel is 3,7157.

Thank you for your help, i hope my problem is understandable.

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