With sufficient heating, the blue colored hydrated copper sulfate crystals common at standard temperature and pressure will lose their water of hydration and lose their blue color. With further heating, the anhydrous crystals will melt.
Hydrous copper sulphate, when heated, turns into anhydrous copper sulphate and changes its color from blue to white. The blue color comes from the water molecules bound to the copper sulphate crystals, and when heated, these water molecules are removed, resulting in a color change.
The formula of the blue crystals of copper sulphate is CuSO4.5H2O. When they are heated mildly, the water from the crystals evaporate, giving just CuSO4. This 'anhydrous' form of copper (II) sulphate is white in colour.
One method to obtain pure copper sulfate from an impure sample is by recrystallization. In this process, the impure sample is dissolved in water, and then the solution is heated and slowly cooled to allow pure copper sulfate crystals to form. These crystals are then filtered out and dried to obtain the pure compound.
When copper sulfate crystals are heated, they lose their water of hydration and turn into anhydrous copper sulfate, which is a white powder. The color change from blue to white signifies the removal of water molecules.
Copper sulfate solution does evaporate when heated. As the solution is heated, the water molecules in the solution gain enough energy to overcome the intermolecular forces holding them in the liquid state, and hence evaporate into the air, leaving behind solid copper sulfate crystals.
Hydrous copper sulphate, when heated, turns into anhydrous copper sulphate and changes its color from blue to white. The blue color comes from the water molecules bound to the copper sulphate crystals, and when heated, these water molecules are removed, resulting in a color change.
The formula of the blue crystals of copper sulphate is CuSO4.5H2O. When they are heated mildly, the water from the crystals evaporate, giving just CuSO4. This 'anhydrous' form of copper (II) sulphate is white in colour.
When blue copper sulfate crystals are heated, the water of crystallization evaporates, turning the blue crystals white. This is due to the loss of water molecules, resulting in anhydrous copper sulfate.
One method to obtain pure copper sulfate from an impure sample is by recrystallization. In this process, the impure sample is dissolved in water, and then the solution is heated and slowly cooled to allow pure copper sulfate crystals to form. These crystals are then filtered out and dried to obtain the pure compound.
Copper Sulphate usually is found in a hydrated form (i.e., water molecules are incorporated into the crystals.) Pure copper sulphate is a pale, greenish gray color. The familiar blue color only occurs in hydrates of copper sulphate (i.e., in crystals that incorporate H20 molecules). Heating the blue crystals can drive off the water. It's still called copper sulphate after you do that. For substances like copper sulphate that naturally attract water, the adjective, anhydrous often is used to describe the pure (water free) state. If you heat copper sulphate to a temperature of 650C, it will decompose into something else. http://en.wikipedia.org/wiki/Copper_sulphate
When copper sulfate crystals are heated, they lose their water of hydration and turn into anhydrous copper sulfate, which is a white powder. The color change from blue to white signifies the removal of water molecules.
Copper sulfate solution does evaporate when heated. As the solution is heated, the water molecules in the solution gain enough energy to overcome the intermolecular forces holding them in the liquid state, and hence evaporate into the air, leaving behind solid copper sulfate crystals.
When heated, copper sulfate crystals lose their water molecules and turn into anhydrous copper sulfate, releasing steam in the process. The color of the crystals changes from blue to white as they lose the water.
they dissolve or dilute
Crystallization is commonly used to purify copper sulfate. The solution containing copper sulfate is heated to dissolve the impurities, then cooled slowly to allow copper sulfate crystals to form and separate from the impurities. The pure copper sulfate crystals can then be separated from the solution through filtration.
When ferrous sulphate crystals are heated, they lose water molecules and undergo dehydration, forming a white powder known as anhydrous ferrous sulphate. This process is also known as thermal decomposition.
When crystals of copper sulfate are heated, the water of hydration within the crystals is driven off, and the anhydrous copper sulfate formed is white in color. This change in color is due to the removal of water molecules, which alters the crystal structure of the compound and causes it to appear white instead of blue.