Household bleach is a 5.0 mass % aqueous solution of sodium hypochlorite, NaOCl. What is the molality of the bleach? What is the mole fraction of NaOCl in the bleach?

Video transcript

well, everyone's on this problem being asked was the mole fraction of acetic acid in vinegar sample were also being asked was the morality of the vinegar sample. So here, in this problem, we go ahead and assume that we have 100 g of a sample. Alright, so we're given the mass% 7.00%. And how to simplify acetic acid to just be capital a. So that just translates that we have 7.00 g of acetic acid And we have 93 g of water. So that's just Htoo. So first we can go ahead and calculate for the moles of each component that we have. Starting off with the moles. So it isn't blue the moles of acetic acid. So we have seven g here will convert this into moles. Just by using the molar mass of acetic acid that's given to us in the problem here. So for every one mole of acetic acid, we have 60.52 g. So we can see here that the units of grams will cancel. So once I put this into my calculator, I get the mole of 0.1166, calculating for the moles of water. So H 20. So we have 93 g. Again, using the molar mass of order to convert us the grams into moles. So for every one mole of water, we have 18.2 g. Again, we see that the units of grams will cancel. So once I put that to my calculator, I get the value of 5.1609 units being moles for both. Here not calculate for the mole fraction of acetic acid, that juice in purple. So the more fraction for acetic acid, we just calculate that to be Their . moles. And now for the total moles as a denominator. So that's just one point or 1.0.1166 plus 5.160 and nine. So once you put that into the calculator, you get the more fraction of acetic acid to be 0.0 to 209. Around this to the correct number of significant figures. That's just 0.2 to one. So that's whatever answers for this problem. Now scrolling down for more space here. Alright, we're gonna go ahead. Also calculate the morality. Some morality is equal to the moles of our salute. Over the kilograms of our solvent. So here we already have the moles being 0.1166 moles of acetic acid. And for the kilograms of the solvent. So that's water. Were calculated that it's 93 g. We want to convert this into kilograms. So we can do a direct conversion here for every 1000 g we have one kg So we see here for a denominator that their units of g will cancel being us with just the units of kg. So once I put this into my calculator, I get the value of immorality being 1.2538. And of course, our ending unit here is just lower case M for morality. So this is my second and final answer for this problem.