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in this video we're going to talk about the difference between a homogeneous mixture and a heterogeneous mixture but what do you think the difference is between these two types of mixtures a homogeneous mixture has visibly indistinguishable parts or you could see is one clear solution and the heterogeneous mixture you can see multiple distinguishable parts a homogeneous mixture has a uniform composition the composition is the same everywhere in the mixture and the heterogeneous mixture is not the same the composition can vary by position so let me give you an example salt water is a homogeneous mixture when you look at salt water all you could see is one clear solution you don't see two distinguishable parts you can only see one visible part now what about oil and water is that a homogeneous mixture or a heterogeneous mixture by the way keep in mind a mixture is a combination of two or more pure substances oil and water do not mix you can visibly see two distinct parts now water is more dense than oil so the water layer is going to be below in the lighter oil layer is going to be above it so because oil and water do not mix you can see it's a heterogeneous mixture you can see the two visible parts now what about brass is brass the homogeneous mixture or is it a heterogeneous mixture brass is a modulus mixture brass is an alloy it's a solid solution of zinc and copper and these atoms are distributed uniformly throughout the material so most alloys tend to be homogeneous mixtures their composition tends to be uniform now what about sand and water is that a homogeneous mixture or is that a heterogeneous mixture sand in water is a heterogeneous mixture you can clearly see two distinguishable parts so dissolves well in water so basically it's you don't see the two distinguishable parts but sand sand doesn't dissolve well in water if you put sand in water the sand will just fall to the bottom and you could see the sand in the water you can see the two distinguishable parts so sand water or sand plus water that's a heterogeneous mixture now what about air is air a homogeneous mixture or a heterogeneous mixture air is a homogeneous mixture you don't see visible parts in air you don't see red arrow blue air it's just it's just air its uniform a composition air contains nitrogen gas oxygen gas argon gas water vapor carbon dioxide and all of these gases they're distributed throughout air uniformly so air is a homogeneous mixture now what about rubbing alcohol is that a homogeneous or a heterogeneous mixture when you look at a bottle of rubbing alcohol do you see one clear solution or do you see a mixture with two this of all parts two or more distinct different parts a bottle of rubbing alcohol looks like one clear solution so therefore it's a homogeneous mixture now what about toss salad with ranch on it would you say that's homogeneous heterogeneous how would you describe it if you have toss salad with ranch it's a mixture but you could see the ranch you could see the green salad you could see the distinguishable parts and so that would be a heterogeneous mixture so it really comes down to what you could see if you can see just one part one clear solution that's a homogeneous mixture if you could distinguish two parts then it's a heterogeneous mixture in case of standing water you can visibly see the water and you could visibly distinguish it from the sand so that makes it a heterogeneous mixture so hopefully this video helps you to clear the difference between these two types of mixtures and you can use what you know to determine if a mixture is homogeneous or heterogeneous so thanks for watching and have a good day