Question

1oo ml. to the pA, iation curve for a weak acid being titrated with a strong base is pll equal to the pk, of base is The r-axis scale goes from 0.0 ml to 20.0 ml. The sharp rise is at the acid? The r-axis 24, At what point in the following titratí 20 a. 0.0 mL b.5.0 mL c. 9.0 ml d. 10.0 mL e. 18.0 ml 25. Acid-base indicators change color a. exactly when pH-pK, of the always between a pH of 6 and 8. e. at the midpoint of a titration. d. indicator. b. generally over a range of I or 2 pH units. e. at pH-7 26. Halfway to the equivalence point in a titration curve of a weak acid with a strong base, nothing is happening yet. a. b. the pH pKs of the weak acid. c, pH=3.5 exactly. d. pH pKa of the indicator. e. the pH has not yet changed.

Answer 1

24) This occurs at the midpoint of equivalence, half the base volume at the equivalence point, this is 5 mL. Option B.

25) Change color when the pH = pKa of the indicator. Option A.

26) At this point, the pH is equal to the pKa of the weak acid. Option B.

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