Category: Lab Photos

Removing red dye before testing pottery for iron

Lab Photo: That’s Not Iron

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...

Carbon dioxiode bubbles released during test for carboxylic acid.

Lab Photo — Test for Carboxylic Acids

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,...