1)吸收反应:
2Cr2O7^2- + 3C2H5OH + 16H+ = 4Cr^3+ + 3CH3COOH + 11H2O
1K2Cr2O7——3/2C2H5OH
2)滴定反应:
Cr2O7^2- + 6Fe^2+ + 14H+ = 2Cr^3+ + 6Fe^3+ + 7H2O
3)计算:
C2H5OH含量={[0.02000*(50.00+7.46)-20.00*0.1253*1/6]*(3/2)*46.07*(500/25)}/(2.500*1000)=0.4044g/ml
1)吸收反应:
2Cr2O7^2- + 3C2H5OH + 16H+ = 4Cr^3+ + 3CH3COOH + 11H2O
1K2Cr2O7——3/2C2H5OH
2)滴定反应:
Cr2O7^2- + 6Fe^2+ + 14H+ = 2Cr^3+ + 6Fe^3+ + 7H2O
3)计算:
C2H5OH含量={[0.02000*(50.00+7.46)-20.00*0.1253*1/6]*(3/2)*46.07*(500/25)}/(2.500*1000)=0.4044g/ml