Reupload from my Tik-tok #science #chemistry #color #acid #pigment #yellow
After Posting Notes:
1. The orange color of the sodium chromate is not due to high concentration, as chromate is bright yellow at all concentrations. The orange is sodium dichromate which was formed along with the sodium chromate. This can probably be eliminated by the addition of sodium hydroxide.
2. I found that sodium metabisulfite is the best and cheapest reducing agent to eliminate hexavalent chromium waste and spillage.
3. When neutralizing chromium chloride into the insoluble base, the product will be chromium hydroxide regardless of whether sodium hydroxide or bicarbonate is used (chromium carbonate is highly unstable and decomposes immediately). That said, sodium hydroxide is probably a better choice as it will eliminate the aerosol-producing bubbling in the hypochlorite addition step..
Негізгі бет Making Sodium Chromate
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