![]() UPLOAD PHOTO AND GET THE ANSWER NOW! Solution : `Co^(II)Cl_2` has a blue colour in tetrahedral geometry. Pink Anhydrous cobalt(II) chloride is blue in blue in colour but on dissolving in water it changes to pink in colour because. When water is added to blue anhydrous cobalt chloride It turns? Compounds that are not soluble in water are cobalt carbonate and cobalt oxide. Does cobalt dissolve in water?Ĭhemical properties Pure cobalt does not dissolve in water, but will dissolve (or react) with acids. Where the water touches the Cobalt Chloride solution, it turns back to a pink color. After the whole solution turns blue, add distilled water. Pink color Chloro Complexes of Cobalt(II) The Hydrochloric Acid turns the Cobalt solution blue. What is the colour change of anhydrous cobalt chloride when moistened?Īnhydrous Cobalt chloride is Blue. On exposure to the water or the water vapours, the cobalt chloride absorbs the water molecule. As the humidity increases the cobalt chloride changes the colour from sky blue to the purple and then to the pink. What do you observe when anhydrous cobalt chloride paper is introduced into water?Ĭobalt chloride changes the colour in response to the humidity. ![]() When the reaction is reversed by adding water, the blue solution of cobalt chloride changes to pink color and heat is evolved, therefore the reaction is exothermic. Is adding water to anhydrous cobalt chloride exothermic? The simplest ion that cobalt forms in solution is the pink hexaaquacobalt(II) ion – 2 +. However cobalt does not react with water that is at room temperature. What happens when you mix cobalt with water?Ĭhemical Properties Cobalt has the ability to react with most acids to produce hydrogen gas.
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