Reactions of oxoanions of chromium
Chromium can form several oxoanions, including chromate (CrO4^2-) and dichromate (Cr2O7^2-). The reactions of these oxoanions depend on the conditions under which they are present. In acidic solutions, chromate ions can be converted to dichromate ions by the addition of hydrogen ions: CrO4^2- + 2H+ ⇌ Cr2O7^2- + H2O Dichromate ions are also able to…