高中化学新教材中说到:“在实验室里检验溶液中是否有SO42-时,常常先用盐酸(或稀硝酸)把溶液酸化,以排除CO32-等可能造成的干扰.再加入BaCl2溶液或Ba(NO3)2溶液,如果有白色沉淀出现,则说明原溶液中有SO42-存在.”这比原教材中说的“用可溶性钡盐溶液和盐酸(或稀硝酸)可以检验SO42-的存在.”更为 According to the New Senior High School Chemistry textbook, “When testing solutions in the laboratory for SO42-, the solution is often acidified first with hydrochloric acid (or dilute nitric acid) to rule out possible interferences such as CO32-. Add BaCl2 solution or The Ba(NO3)2 solution, if a white precipitate appears, indicates that SO42- is present in the original solution.“ This is more than the original textbook says, ”The presence of SO42- can be checked by using soluble barium salt solution and hydrochloric acid (or dilute nitric acid). ."More