MCQ – 85819 Leave a Comment / Uncategorized / By amit18289 Question Gibbs-Donnan equilibrium is mainly due to? A. Ca 2+ B. PO4- C. Bicarbonate D. Proteins Show Answer Correct Answer � D Explanation Ans. D. Proteins Donnan & Gibbs showed that in the presence of a non-diffusible ion (protein), diffusible ions distribute themselves differentially at equilibrium. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like this:Like Loading…