Is Water a Liquid in the Decomposition of Copper (II) Hydroxide?

[honeyDew]

I need Helps... Decomposition Reaction WE

is this how you're supposed to write a decomposition reaction in a word equation?

Copper (II) hydroxide decomposes with heat into the copper (II) oxide and water

...so then the water in this one would be a liquid right?

 

[The Bob]

...so then the water in this one would be a liquid right?

Assuming it is under the correct temperature, the water will be water vapour, thus, a gas.

The Bob (2004 ©)

 

[honeyDew]

well we placed it into a hot water bath ...and constantly stirring it ... the color change so i guess it's gas ...right?

 

[The Bob]

well we placed it into a hot water bath ...and constantly stirring it ... the color change so i guess it's gas ...right?

What changed colour? The water?

The Bob (2004 ©)

 

[Nerro]

The colour change tells you that the Cu(OH)_2 has changed somehow chemically. Since the most likely change is dehydration that is what you should reasonably assume is what happened. Basically the Cu(OH)_2 was probably hydrated to some extent and what happened is that you have removed this crystal water by heating the hydrate. Cu(OH)_2.nH2O(s) \xrightarrow{heat} Cu(OH)_2(s)~+~nH_2O(g) describes this reaction.

When the Cu(OH)_2 decomposes it leaves CuO and H_2O. The H_2O will be released at temperatures of around 185^{o}C which is unlikely to be achieved in a hot water bath.

 

[honeyDew]

oh I see now...thank you so much for your helps :)