Chrome-yellow is unaltered by heating with weak hydrochloric acid, but destroyed by the concentrated acid. It is destroyed by caustic alkalies; boiling potash converts it into orange. Chrome ...
If a BTB solution becomes more acidic, the solution changes to a yellow color (BTB is yellow at pH <6 ... (We used a few drops of 0.2 M Hydrochloric acid to adjust the pH of the BTB.) 4, 8 Nothing - ...
A white precipitate forms if sulfate ions are present. Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white ...
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