Melting #2 : Copper (II) Sulfate (Confusion)

Melting #2: Copper (II) Sulfate (Confusion)

The last time we melted sulfur, and it was really fun (except for cleaning the test tube). Now let’s melt something else, what about Copper Sulfate?

Copper (II) sulfate is the inorganic compound with the chemical formula CuSO4. Older names for this compound include blue vitriol, bluestone, vitriol of copper, and Roman vitriol. The pentahydrate (CuSO4·5H2O), the most commonly encountered salt, is bright blue.

Melting Point: 110 °C (230 °F)

Sulfur’s melting point is 5 °C higher (which means they’ll melt about the same time). So let’s get started.

It looks impossible to melt it because the sulfur is more (soft) like a powder, but this one is tiny crystals. Let’s give it a try anyway.

20170808_164455

Light the lamp!

20170808_164526

OK, it’s heating it up nicely.

A couple minutes later:

20170808_164546

The copper sulfate is turning whiter, but still, all of it still remains solid.

But look. There’s water vapor in there. That’s weird, maybe there’s too much heat? But the sulfate didn’t melt yet.

10 minutes later:

20170808_164848

The sulfur melted already at this time. But the sulfate still remains a solid and it’s just turning whiter.

20 minutes later:

20170808_165401

This is taking forever! It’s not melting. Did I do something wrong?

20170808_165118

It’s 115 °C already, and the temperature can go further.

I guess it won’t melt anymore so I turned off the heat.

Wow! this experiment is a fail. I wonder why it has water vapors? Why is it turning white? When is it actually going to turn to liquid?

Any ideas why it didn’t melt? Feel free to comment down below ↓

About Dan the Young Scientist

Science is my Life!
This entry was posted in Experiments and Studies and tagged , , . Bookmark the permalink.

4 Responses to Melting #2 : Copper (II) Sulfate (Confusion)

  1. “110 °C (230 °F; 383 K) decomposes (·5H2O) <560 °C decomposes" Found this on Wikipedia, not sure what it means but I'll find out.

    Like

  2. Reblogged this on Creative Crafts DIY and commented:
    Mr little einstein 👌😊

    Liked by 1 person

What's your Opinion?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s