Thread: [HELP] Problems about crystallization salt

Regarding to the subject...

During the crystallization process, will all the salt be crystallized out? Why?

Another question...

Copper(II) nitrate can be prepared by adding nitric acid to copper(II) oxide.
Is that true? Why?

Last one,

Why is the salt solution not evaporated to dryness?

Hope somebody can help me out.

Not that I know all that much about chemistry, but let me take a guess to part of your second question.

Copper(II) nitrate


Nitric acid


Copper(II) oxide


So for the equation we have:
-->

Balancing this out we have:
-->

In word format:
Nitric acid + Copper(II) oxide --> Copper(II) nitrate + Hydrogen + Oxygen

That 2H and O look suspicious. Perhaps they join to make water? I also don't think I know enough to come up with the process that does this.

Originally Posted by Demen Tolden

Not that I know all that much about chemistry, but let me take a guess to part of your second question.

Copper(II) nitrate


Nitric acid


Copper(II) oxide


So for the equation we have:
-->

Balancing this out we have:
-->

In word format:
Nitric acid + Copper(II) oxide --> Copper(II) nitrate + Hydrogen + Oxygen

That 2H and O look suspicious. Perhaps they join to make water? I also don't think I know enough to come up with the process that does this.

Thx for answering the question :-D

im rather certain that metal oxides react with metals to form the metal salt PLUS water (H2O) so yea, they do not really form hydrogen gas and oxygen gas.