Exam 3 sp17[Compatibility Mode] - Word Faxit POF Mailings Review View Tell me wh

Question

Exam 3 sp17[Compatibility Mode] - Word Faxit POF Mailings Review View Tell me what you want to do bCABbce Heading 11 Normal Strong A ·A- : 'a . _ . || Emphasis Subtitle Paragraph Styles un 20) The following titration curve indicates the titration of what kind of substance? A) strong monoprotic acid B) weak monoprotic acid C) diprotic acid D) triprotic acid E) weak base 14.0 12.0 10.0 pH8.0 6.0 4.0 2.0 5.0 10.0150 20.0 25.0 30.0 Volume of 0.100 M NaOH, ml. 21) bonus) What can small, multiply charged metal ions do when in an aqueous solution? 21 A) Form a complex B) Make the solution acidic C) Be amphoteric D) All of the above

Explanation / Answer

20) ANswer C

Explanation: Dissociation of diprotic acid is given by

AH2(aq) ==== AH-(aq) + H+(aq); Ka1

AH-(aq) ==== A^2-(aq) + H+(aq) : Ka2

Thus a diprotic on reaction with base there an equivalent point for each dissociation. Hence two equivalence points in the given curve

21) A small sized and high charged cation attracts surrounding water molecules effectively and forms a coordination complex

Answer: A

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