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MMLU-Pro / 4338 / A solution of a weak base is titrated with a solution of a standard strong acid.…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A solution of a weak base is titrated with a solution of a standard strong acid. The progress of the titration is followed with a pH meter. Which of the following observations would occur?

category

chemistry

options

  1. Initially, the pH quickly decrease, then there is a gradual decrease to the equivalence point where the pOH equals the pKb of the base.
  2. Initially, the pH quickly decreases, then there is a gradual decrease to give a pH equal to 7 at the equivalence point.
  3. Initially, the pH slowly increases, then there is a rapid increase to give a pH above 7 at the equivalence point.
  4. Initially, the pH slowly decreases, then there is a rapid increase to give a pH equal to 7 at the equivalence point.
  5. The pH of the solution gradually decreases throughout the experiment and the pH at the equivalence point is above 7.
  6. Initially, the pH slowly decreases, then there is a rapid decrease to give a pH equal to 7 at the equivalence point.
  7. The pH of the solution gradually increases throughout the experiment and the pH at the equivalence point is above 7.
  8. Initially, the pH slowly decreases, then there is a rapid decrease to give a pH below 7 at the equivalence point.
  9. Initially, the pH quickly decrease, then there is a gradual increase to the equivalence point where the pOH equals the pKa of the base.

src

ori_mmlu-high_school_chemistry

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Source and history

upstream_id / Original problem ID
4338
task_id
cd11ac87-97f8-5bb0-9cc2-4e9f39f4e236
task_key
default--test--4338
task_revision_id
1
config / split
default / test

Official source

initial import