╔══════════════════════════════════════════════════════════════════════════════════════════════════════════ Let say, the combination of potassium hexacyanoferrate(III) and phenolphthalein would be the rust indicator. And we use to detect the rusting of an iron nail. And the result is: the suggestion, head region from the nail seem blue color; the straight region appears pink shade. Yo... https://shigesatoz345lkk5.actoblog.com/profile