The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. The Kphenolphthalein = 4 x 10–10. Given : log2 = 0.3 The number of following statements which is/are

Question

The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. The Kphenolphthalein = 4 x 10–10. Given : log2 = 0.3 The number of following statements which is/are correct about phenolphthalein is ____________ A. It can be used as an indicator for the titration of weak acid with weak base. B. It begins to change colour at pH = 8.4 C. It is a weak organic base D. It is colourless in acidic medium

Prashant Kotian · Accepted Answer

Correct answer: .. 1. Working pH range is 8 to 10 2. It is colourless in acidic medium and pink in basic medium. 3. It is an acidic indicator. | JEE(Main) 2023 | DATE : 08-04-2023 (SHIFT-1) | PAPER-1 | CHEMISTRY PAGE # 10

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