An acidic solution of sugar was hydrolysedto the extent of 57% after 66 minutes. Assuming the reaction to be of first order , calculate the time taken for 75% hydrolysis.

t=2.303klog[A]o[A]tk=2.30366 loga.43 a       ([A]57% =a-.57a)k=0.0349×.366=0.0127 min-1
Now, time taken for 75% hydrolysis 
t75% = ‚Äčt=2.3030.0127loga.25 at= 181.339×.6020 min  =109.17 min

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