The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name? A)Cobalt dichloride B)Cobalt(II)chloride C)Cobalt chloride D)Cobaltic chloride E)Copper(II)chloride

Question

Quizplus · Accepted Answer

The correct name for the substance is cobalt(II) chloride. The "(II)" indicates the oxidation state of cobalt and distinguishes it from other possible forms of cobalt chloride such as cobaltic chloride.

The Substance, CoCl2, Is Useful as a Humidity Indicator Because

The Substance, CoCl₂, Is Useful as a Humidity Indicator Because