淡色效应
参考答案:降低吸收强度的效应叫做淡色效应。
The new stadium being built for the next Asian Games will be _______the present one.
A.as three times big as
B.three times as big as
C.as big as three times
D.as big three times as
以甲基橙为指示剂,用氢氧化钠标准滴定溶液滴定三氯化铁溶液中少量的游离盐酸,Fe3+将产生干扰。加入下列哪一种溶液,可消除Fe3+的干扰()。
A.柠檬酸三钠;
B.酒石酸三钠;
C.三乙醇胺;
D.氰化钾;
E.Ca2+-EDTA(以CaY表示)