00:01
So this is another yield question, right? so they're telling us that magnesium chloride is decomposing into magnesium metal.
00:10
And we start with 185, sorry, we recover 185 grams of magnesium, but we started with 100 ,000 grams or one kilogram of magnesium chloride.
00:25
Right? so you'll notice that i didn't finish the equation, right, because i wanted to do it with you.
00:30
So when you have magnesium chloride, any metal chloride, when they decompose and you form the elemental metal is what we call this magnesium by itself.
00:40
Right.
00:41
So the balancing equation, you're also going to make chlorine gas as a product.
00:45
It's not important for this, the math at all, but i just wanted to practice writing or predicting products, right? so we start with a thousand grams.
00:59
And we need a theoretical yield.
01:01
So when we're calculating percent yields, right, it's the actual amount that you collect, which in this case is going to be the 185 grams over the theoretical amount of product that's formed based on the math that we're going to do right now.
01:19
Right.
01:20
So 1 ,000 grams of magnesium chloride, right? so we're going to go to moles of magnesium chloride, and the way that we do that is the molecular weight.
01:28
So based on my calculation, the molecular weight is 95 .21 grams of magnesium chloride...