The first experiment we’re going to look
at will have to do with the process that involves copper II sulfate
and iron. In this case we’re going to use, instead of steel wool, we’ll
use steel shavings. So let’s take a look at what those look like.
Here are the steel shavings and if you look at them you’ll see that their solid,
their metallic and they’re shiny. With this experiment we’re going to be
looking at how things look before the process and then how things look after
the process, so we can ascertain that whether or not a change has occurred.
That’s why it’s going to be important for us to be able to see what things
were like before and then what things were like afterwards. And if you look at
this you’ll see that they’re kind of flexible as well and malleable, as one would
call that… Alright… the other thing we’re going to
be using here will be copper sulfate or copper II sulfate. It comes in a bottle
that looks like this, and I’m going to put some into a test tube and see what
that looks like. In a second… there we go so I want you just to look at that and
see what you observe about it. What you should be observing is that it’s clear
and it’s blue. The term “clear” simply means you can see through it. Blue is
obviously the color of the liquid. I’m going to go ahead and add the steel to
the copper sulfate and we’re going to see what happens. I’m going to go ahead and shake it a
little bit, and see if any changes have occurred.
When we’re looking at changes, we’re going to be looking at what we can see,
what we can hear, and what we can feel. When I feel this I don’t feel any
changes at all as far as heat goes, so there’s no heat or cold going on here.
When I listen I don’t hear any changes… there’s no fizzing or anything else
going on. But I can see some changes and I’m going to leave it to you to decide
what kind of changes you could see from what we started with to what we finished