A pale orange solution is sprayed onto a sheet of seemingly blank, white paper. Dark red and blue lettering appears.
Fe3+ + SCN- → FeNCS2+ (dark red)
Fe3+ + Fe(CN)64- → Fe2(CN)6-(s)
To Conduct Demonstration
Demo Time: ~10 minutes
Eye protection should be worn to prevent spray from getting in eyes.
Margaret Asirvatham, Spring 1995
Lora Ruffin and Michael Polk, Summer 2009