← back to the Substrate Record

qid 4045 · chemistry

Question: H_2(g) + 2AgCl (s) + 2H_2O \rightarrow 2Ag(s) + 2H_3O^+(Ag) + 2Cl^-(Ag). It has been determined that at 25°C the standard free energy of forma-tion of AgCl(s) is -109.7 kJ/mole, that of H_2O(l) is -237.2 kJ / mole, and that of (H_3O^+ + Cl^-) (ag) is - 368.4 KJ / mole. Now assuming the reaction is run at 25°c and 1 atm of pressure in a cell in which the H_2(g) activity is unity and H_3O+(ag) and Cl^-(ag) activities are .01,what will be the cell voltage?

  1. .236v
  2. 0.500v
  3. 1.00v
  4. 0.750v
  5. .223v
  6. .459v
  7. 0.125v
  8. 0.610v
  9. 0.325v
  10. 0.150v

Our answer: F. .459v Source quote machine-checked (exact quote)

A machine check confirms the quoted words appear at the source. A person has not yet reviewed these. EARN MARKS as a Human Reviewer

How it was answered

Stored method, replayed by code (kind: formula)

card: formula · card sha256 cef3a6606ed44e3a…

Current source

Wikipedia, Nernst equation

https://en.wikipedia.org/wiki/Nernst_equation

“The cell potential E associated with the electrochemical reaction is defined as the decrease in Gibbs free energy per coulomb of charge transferred, which leads to the relationship”

Source quote machine-checked (exact quote)

retrieved 2026-09-18T00:09:52.344Z

page text sha256 38921609ab47198f… · content sha256 be8c6be6e9a5bef6…

addendum formula_qid4045.formula_ADDENDUM_source_rs20260918T000952Z · sha256 d0a3ace5d77aa632… · replaces the version below, addendum sha256 2b4d93c215aa387e…

Earlier version (superseded)

https://en.wikipedia.org/wiki/Nernst_equation

Source weak (http_get_200_text_and_question_terms)

retrieved 2026-09-17T01:43:33.891Z

page text sha256 44ce46be857dc3d3… · content sha256 —

addendum formula_qid4045.formula_ADDENDUM_source_bf20260917T014333Z · sha256 2b4d93c215aa387e… · replaces the version below, addendum sha256 ae50409536f37eb1…

Earlier version (superseded)

No public source has been found for this card yet (2 places checked internally).

addendum formula_qid4045.formula_ADDENDUM_source · sha256 ae50409536f37eb1…

If you have a Citable Source to dispute or challenge this, ADD IT so we can correct the answer by appending, never deleting. — hello@lianabanyan.com