science, technology, engineering, mathematics
I had just finished using a heat gun to dry some glassware. Which one did I just finish drying? Uh huh… hot glassware looks the same as cold glassware. One of those lab lessons that it’s good to...
Both aldehydes and ketones have a carbonyl group (a carbon double bonded to oxygen). The compound 2,4-dinitrophenylhydrazine (2,4-DNP or 2,4-DNPH) undergoes a reaction with the carbonyl group in aldehydes and ketones that gives a precipitate like the yellow...
This photo is from an independent study project during which the iron content was determined for various pottery samples. There was an expectation that the red pottery might have iron as iron oxides are known to impart a...
A small portion of solid NaHCO3 was added to the unknown sample dissolved in water. The formation of CO2 bubbles can be seen clearly in this picture. The sodium bicarbonate reacted with the unknown acid to produce salt,...
