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43. The indicator congo red is at pH 1 and red at pH 14 and has pKa- 4.1. Based on this blue information a. it would be a good choice for a strong acid strong base titration b. it is blue at pH 4 c. its end point occurs at pH 9.9 d. it is red at pH-3 e. it would be a good choice for a strong acid weak base titration
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2. So on. 2)

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