What white anhydrous copper sulfate turns blue

authormessage
guest






Posted: May 31, 2004 12:21 PM Title: Blue copper sulfate hydrate is heated - Description of the experiment

Hey
I urgently need a description of the experiment, including materials, implementation, observation and interpretation
1. Blue copper sulphate hydrate is heated
2. Adding water to white copper sulfate

I wasn't at school that day and I can't copy it from anyone, because our teacher collects it on Tuesday.
Can you help me?

greeting
Lara
Thomas
Administrator


Registration date: 02/16/2004
Posts: 489

Written on: May 31, 2004 2:15 pm Title:

Hi,

normally you don't have to do something like that if you haven't seen the attempt.

I'll make a description of the experiment out of my head, purely theoretically:

When the blue hydrate of copper sulfate is heated, a white coloration is observed. Reason: water escapes, copper sulfate hydrate becomes copper sulfate.

Conversely, when adding water to copper sulfate: Copper sulfate turns blue because copper sulfate becomes copper sulfate hydrate.

Greeting,
Thomas
S-a-W-e
guest





Posted: Feb 12, 2006 6:09 PM Subject:

Hello. I urgently need help .... Has to give a presentation in chemistry about the types of salt formation .. knows jm about and can help me? Don't know what to do.


Thanks in advance.
MinisterOfSillyWalks
guest





Kaythechemist



Registration date: 01/21/2006
Posts: 108
Place of residence: Mönchengladbach
Posted: Feb 12, 2006 7:03 PM Subject:

S-a-W-e wrote the following:
Hello. I urgently need help .... Has to give a presentation in chemistry about the types of salt formation .. knows jm about and can help me? Don't know what to do.


Thanks in advance.


have you ever informed yourself like this at www.wikipedia.de
or so?
BurakSZ
guest





Posted: May 03, 2009 6:00 PM Title: Thank you

Thanks to MinisterOfSillyWalks, helped me a lot, good contribution, very understandable, just perfect, thank you.
I'm smart
guest





Posted: Nov 16, 2011 8:19 PM Subject:?

Hello,
so tomorrow I'm writing a class test on exactly the same topic! I know your question has long been answered, but this question keeps coming up!
We tried it at school, I can just write down what I wrote down, and I hope that helps:
Material:
Test tube, gas burner, wooden clip, pipette, copper sulfate, water
Execution:
Fill a spartel of copper sulphate into your test tube and heat it carefully (!) With the gas burner (rustling flame).
Observation:
The copper sulfate slowly turns white. Water vapor settles on the test tube -> it steams up. If you add water, the blue color returns. So copper sulfate hydrate is a mixture of water and copper sulfate, if I got that right! (otherwise please improve !!!)
Interpretation:
1. Copper sulfate hydrate -> copper sulfate + water (endothermic)
2. Copper sulfate + water -> copper sulfate hydrate (exothermic)

I hope this can help some of you a little!
Best regards! : - '*