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MMLU-Pro / 3937 / Lemon juice is very acidic, having a pH of 2.1. If we assume that the only acid…

Problem

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question

Lemon juice is very acidic, having a pH of 2.1. If we assume that the only acid in lemon juice is citric acid (represented by HCit), thatHCitismonoproticand that no citrate salts are present, what is the concentration of citric acid in lemon juice? The dissociation constant for citric acid HCit+ H_2O \rightleftarrows H_3O^+ + Cit^- is K_a = 8.4 × 10^-4 mole/liter.

category

chemistry

options

  1. 7.5 × 10^-2 M
  2. 2.1 × 10^-3 M
  3. 1.2 × 10^-2 M
  4. 6.3 × 10^-5 M
  5. 9.0 × 10^-3 M
  6. 5.0 × 10^-2 M
  7. 4.2 × 10^-3 M
  8. 3.7 × 10^-4 M
  9. 8.4 × 10^-4 M
  10. 10^-2.1 M

src

stemez-Chemistry

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Source and history

upstream_id / Original problem ID
3937
task_id
ff665a8f-be8b-5925-aedd-c099e55f4a65
task_key
default--test--3937
task_revision_id
1
config / split
default / test

Official source

initial import