题目内容
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[单选题]
K₂Cr₂O₇标准溶液（0.02000mol/L)对Fe₃O₄（M=231.45g/mol)的滴定度为（)。
A.0.001389
B.0.002779
C.0.009262
D.0.004631
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.0.001389
B.0.002779
C.0.009262
D.0.004631
如果结果不匹配，请 联系老师 获取答案
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A.C(1/5 K₂Cr₂O₇)=2.5C(K₂Cr₂O₇).
B.5C(1/5 K₂Cr₂O₇)=C(K₂Cr₂O₇)
C.C(1/5 K₂Cr₂O₇)=C(K₂Cr₂O₇)
D.C(1/5 K₂Cr₂O₇)=5C(K₂Cr₂O₇)
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