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【多选题】
根据大量实践证明,判断多元酸能否滴定的原则是( )。
A.
当多元酸各级的 ,则该级离解的 可被滴定
B.
当相邻的两个 值,相差 时,在前一个化学计量点时将出现一个滴定突跃
C.
如相邻的Ka值相差小于 时,滴定时两个滴定突跃将混在一起,无法进行分步滴定
D.
多元酸中所有的 都能被滴定。
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