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MMLU-Pro / 4117 / A chemist mixes .5 moles of acetic acid (HC_2H_3O_2) and .5 moles of HCN with…

Problem

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question

A chemist mixes .5 moles of acetic acid (HC_2H_3O_2) and .5 moles of HCN with enough water to make a one liter solution. Calculate the final concentrations of H_3O^+ and OH^-. Assume the following constants: KHC2 H3 O2= 1.8 × 10^-5, K_HCN = 4 × 10^-10, K_W = 1.0 × 10^-14.

category

chemistry

options

  1. [H_3O^+] = 3.0 × 10^-3M, [OH^-] = 3.3 × 10^-12M
  2. [H_3O^+] = 9.0 × 10^-6M, [OH^-] = 1.1 × 10^-9M
  3. [H_3O^+] = 7.0 × 10^-11M, [OH^-] = 1.4 × 10^-4M
  4. [H_3O^+] = 2.5 × 10^-7M, [OH^-] = 4.0 × 10^-8M
  5. [H_3O^+] = 1.0 × 10^-7M, [OH^-] = 1.0 × 10^-7M
  6. [H_3O^+] = 1.8 × 10^-3M, [OH^-] = 5.6 × 10^-12M
  7. [H_3O^+] = 1.8 × 10^-5M, [OH^-] = 1 × 10^-14M
  8. [H_3O^+] = 3.3 × 10^-12M, [OH^-] = 3.0 × 10^-3M
  9. [H_3O^+] = 5.0 × 10^-9M, [OH^-] = 2.0 × 10^-6M
  10. [H_3O^+] = 4.0 × 10^-10M, [OH^-] = 3.0 × 10^-3M

src

stemez-Chemistry

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Source and history

upstream_id / Original problem ID
4117
task_id
b45d2bd5-605b-5de1-bfc4-5089cbd2dc26
task_key
default--test--4117
task_revision_id
1
config / split
default / test

Official source

initial import