 Brett today we're going to make a solution and we I ask you to calculate how many grams we would need to make a solution but first let's look at the volumetric. A volumetric flask is made specifically for for measuring out molarity. See that mark right there? Yes. Right. And you can feel it. It's actually etched in the glass. This is a 200 milliliter volumetric and what you're going to do is you're going to fill it about half full of water, measure measure out your sample, add it, swirl it around to get it to dissolve, and then you want to fill it exactly to that level. Remember the meniscus? Yeah. The bottom should be right there. Okay. So how much copper sulfate did you calculate that you needed? I checked. I need 7.99 grams. All right. Okay. First I'll pull. And that's 7.99 grams. Okay. Now when you have all the solid in there, I can just add a little water and it'll go smoothly and we want to rinse to make sure that we get every drop of the copper sulfate in your volumetric. Okay. That looks good. Now go ahead and fill it to the rim, to the line there. Now you want to mix it up really well one more time just to make sure that the level doesn't drop again. So put your, yes, hold it tight and turn it over again. You see that how it's going, the meniscus is changing there? I'll read it and then see if it's still at the line. Did it change? Yeah, it's a lot under it now. Okay. So add a little bit more. Okay. That should do it. So now you have a 0.16 molar solution. That's all there is to it? That's all there is to it.