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How can you tell if a hydrate has turned into an anhydrous salt?
Wiki User
∙ 14y ago
1- on heating the mass of material becomes reduced due to elimination of water molecules. 2- in some cases the colour change may be observed as penta hydrated copper sulphate is blue while anhydrous copper sulphate is a white solid.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoAnhydrous just means 'without water', it doesn't mean 'insoluble in water'. e.g. Copper sulphate usually exists as a pentahydrate, but can be anhydrous (meaning there is no water of crystallisation present), but is very soluble in water.
Wiki User
∙ 14y agoDissolve the anhydrous compound in water then evaporate the excess amount of water by heating when solution becomes concentrated allow it to cool the crystals of hydrated compound thus formed are allow to dry.
Wiki User
∙ 12y agoHeat it until no more water vapors are seen being evaporated.
Wiki User
∙ 11y agoOn heating, hydrated salts lose their water of crystallization and as a result, the crystals lose their shape and colour and change to a powdery substance.
Wiki User
∙ 11y ago- change of color: for ex. CoCl2.6H2O----------CoCl2 (red to blue)
- change of the molar mass or mass: using thermogravimetry loss of water can be followed and monitorized
Wiki User
∙ 13y agoVery simple, by drying at 110 0C the hydrate water is released.
Wiki User
∙ 6y agoThis is possible for some hydrates.
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