this is the salt and sand mixture lab where we're going to separate a mixture of salt and sand so here's our mixture it's a heterogeneous mixture you can see the different lumps of salt and sand in here and the goal in today's lab is to separate the salt from the sand and to figure out what percentage of the mixture was salts and what we're summing to make sure once and the procedure is to first take a evaporating dish and a wash cloth we're gonna get the mass of this as it's empty and the mass of the empty vibrating dish and watch glass is 80 point six seven eighty point six seven for the empty evaporating dish and watch glass and now we're gonna take our sample of salt and sand mixture Sol just stir this around and take a random sample of salt and sands let's have your good amounts and we'll weigh it again and we have eighty eight point three nine eighty eight point three nine for the salt and sand mixture all right the next step is to dissolve the salt and sand in a bit of water so we're using differences in physical properties we know that salt will dissolve in water and sand will mount to our mixture into a small beaker and then we're gonna add about ten milliliters of water and the water will dissolve the salt but it won't have any effect on the sand so the separated make sure you use if you use differences in physical properties and the physical property we're using right here is solubility in water salt will dissolve in water pretty easily and sand does not now to separate the salt water from the sand we're going to use filtration so we're going to set up the filtration apparatus right here we have an Erlenmeyer flask and a funnel and we'll take a piece of filter paper and we'll fold it to make a filter so we fold it make a filter and now we can pour the salt water through the filter the salt water will go through the filter and it will catch the sand and it will hold it out of the filter so you can see the salt water going in here and then you can see the sand remaining up there at the top there's still a bit of sand in here we're gonna wash it off with about ten more milliliters of water to get any sand or any salt that hasn't dissolved yet we'll stir that around make sure all the salt is dissolved and we'll pour the rest of this through the filter the filtration is kind of slow we have a filter with very small holes in it so it takes a little while for the water to drip through but you can see it is dripping through there slowly here's one that I actually started a bit earlier so this one you can see that the sand is now in the filter and all the saltwater is move down into the beaker we can get rid of the sands we don't need the sand we're just going to throw this part away and what we're gonna keep is the saltwater and now we need to separate another mixture we have a mixture of salt and water we want to separate the water from the salt and here we're going to use another physical property and that is boiling point we know that salt and water have different boiling points so if we heat this mixture we're gonna do that in our evaporating dish so we'll take our evaporating dish back over here then we wait at the beginning and we'll pour our salt water into the evaporating dish and we'll cover it with the watch glass and now we're gonna heat this over the Bunsen burner we know that water has a low boiling point and it's a little boil off first and the salt is a very high boiling point so it'll remain later we'd like this Bunsen burner we let it go until all the water has evaporated and I have one that I did a little bit earlier and so after all the waters evaporated this is what it would look like and you get to do the salt is all dried out and all the water has been removed I know that the water's been removed we can find the final mass of our salt in the evaporating dish with the watch glass and the final mass is eighty three point six nine so after all the sand has been removed after all the water has evaporated off eighty three point six nine is the mass of the dish with the salt in it and now you can subtract to figure out how much of the mixture was salt and how much the mixture was sand and to find the percentage of salt and percentage of sand in the mixture just to review we use differences in physical properties to separate the mixture