taylorlewis
Jun 14, 2009, 09:38 AM
Why is CoCl2 used in hygrometers?
Perito
Jun 14, 2009, 10:04 AM
CoCl_2 changes color from blue (dry) to pink (wet) when it gets moist. It can, therefore, be used as a sensor by passing light through it and detecting absorbance.