00:01
This question is about the solubility of potassium permanganate.
00:06
And so what we see is that the potassium permanganate, if you have just a few crystals, for 25 milliliters water, if you've got hot water, it's approximately about five times as soluble as compared to the cold water.
00:25
In that at zero minutes, both of them have zero.
00:28
And then when you instantly put it in there, the hot water, it's got.
00:33
Going to be like after the end of the five minutes.
00:35
It's a light pink.
00:37
It's not really a dark purple.
00:39
But it's a very light pink all the way throughout.
00:42
And then at the bottom is a very thick, dark purple.
00:47
At the end of the five minutes in cold water, we have just the very bottom part, and it's just starting to work its way up the jar, the beaker.
00:58
I have an image here to to show and share and to demonstrate that the one closest to the finger is the cold water.
01:06
So you see there's a lot of dark purple there at the bottom and almost none spread throughout.
01:12
Whereas the pink is pervasive on the one where it's the hot.
01:17
You can tell it's the hot water because of the water condensing along the sides of the jar of the beaker.
01:24
And then at the end of 10 minutes, you'll have the bottom.
01:30
And it's going to be completely filled up.
01:33
And on the purple that i've got here, that it's the purple part of the hot beaker.
01:44
And then the cold water one is just about maybe halfway in the color and that we might be moving up and migrating up.
02:00
And so this is with the plus signs.
02:03
Of course, it's somewhat variable, and i'm not sure exactly what your instructor has given you as instruction.
02:09
But i'm saying in the hot water, it goes from zero, and then at the end of five minutes, maybe a plus three, and then a plus five, at the end of ten minutes, and it's pervasive all the way throughout.
02:21
And then with the cold water, it's got maybe a plus one, and then it goes to a plus three.
02:26
It's a slower rate because the molecules within each of the beakers are moving slower for the cold water.
02:33
Water as compared relative to the hot water.
02:37
At some point, though, that the hot water will cool down to where at some point, and i'm not sure if it's at the 10 -minute mark or if it's a little bit later, but it comes into what's called equilibrium with the temperature that is surrounding it and that the molecules, i'm sorry, the ion, potassium and the ion, the manganates, will end up becoming more in equilibrium...