1 酸使紫色石蕊试液变红,使无色酚酞试液不变色.盐酸使紫色石蕊试液变红,无色酚酞试液不变色 硫酸使紫色石蕊试液变红,无色酚酞试液不变色.金属+酸→盐+氢气 Zn+2HCl=ZnCl2+H2↑ Zn+ H2SO4 =ZnSO4+H2↑ 碱性氧化物+酸...