蔗糖水解反应速率常数的测定

蔗糖水解反应速率常数的测定五、实验数据记录及处理室温:26.0?大气压:103.2KPaC(HCl)=2mol/L反应温度:26.0?表1实验数据记录t/minαln(α-α)t/minαln(α-α)ttt+Δttt+Δ116.331.8718405.570.9708514.381.7527454.760.81981012.601.6351504.040.67801511.241.5581553.44209.871.4586602.93258.611.3481652.49307.471.2326702.07356.491.1151图1α对时间t作图t2如图在计算机中二次拟合方程为:y=16.6420-0.4448x+0.00507x故α=α=16.6420α=,0.311α=,5.1757?0t(0)0图2ln(α-α)对时间t作图tt+Δ如上图所示，在计算机中拟合的方程为:y=1.9024-0.0235x根据方程:ln(α-α)=ln(α-α)-kt?tt+Δ0-3-1可知:k=0.0235=23.5×10min