問題詳情
78. An unknown concentration of NH3 solution is titrated by HCl solution. The color change for indicators at different pH valuesare shown in the table below. Which of the following indicators is the best for this titration?
(A) phenolphthalein
(B) alizarine yellow R
(C) methyl red
(D) crystal violet
(E) thymol blue
參考答案
無參考答案
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