15.(1)H2 SO>CH COOH>H2CO>HCIO(2(2)HClO=C1O+H+(2分)(3)有气泡生成(2分);2CH3COOH+CO⅓一2CH3COO厂+CO2个+H2O(2分)(4)SO2+3C1O-+H2O=C1+SO2-+2HC1O(2分)(5)①正反应(2分)②增大(2分)