Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
Boskey
Lv 6
Boskey asked in Science & MathematicsChemistry · 5 years ago

What is the ∆G°f for the weak acid, formic acid, HCHO2 at 298 K?

The Ka for formic acid is 1.8 × 10–4 at 298 K, the ∆G°f of H+ is 0 kJ/mol and the ∆G°f of formate ion, CHO2– is –335 kJ/mol.

1 Answer

Relevance
  • DavidB
    Lv 7
    5 years ago
    Favorite Answer

    ∆G° = -RTlnKa

    so calculate ∆G° for the reaction

    then we also can calculate ∆G° from heats of formation

    ∆G° = (∆G°f(H+) + ∆G°f(CH2O-)) - ∆G°f(HCH2O)

    since you know ∆G° solve for ∆G°f(HCH2O)

Still have questions? Get your answers by asking now.