TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Test for carbon dioxide. Apparatus used to determine if the gas produced by a reaction (test-tube, centre) is carbon dioxide. The flask (right) contains saturated calcium hydroxide solution (lime water). The gas from the reaction passes up through the glass tube (top) and out the other end, into the lime water. The lime water has turned milky, which shows that the gas is carbon dioxide.
Model release not available. Property release not required.