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The optical rotation of surcose in 0.5 ...

The optical rotation of surcose in 0.5 M HCI at `35^(@)`C at various time interval are given show that the reaction is first order
Time (minutes) 0 10 20 30 40 `prop`
Rotation (degrees) +32.4 +28.8 +25.5 +22.4 +19.6 -11.1

Text Solution

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In this case, `a_(0) = r_(0) - r_(oo) + 32.4 - (-11.1) = +43.5`

The constancy of `k_91)` indicates that the inversion of sucrose is a first order reaction.
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