题目内容
某溶液中可能含有SO
、CO
、Cl -。为了检验其中是否含有SO
,除BaCl 2,除BaCl 2溶液外,还需要的溶液是( )
2021-09-01
A.H2SO4
B.HCl
C.NaOH
D.NaNO3
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