Heterogeneous mixtures

powerpoint presentation

1. Heterogeneous Mixtures Ms. G. Martin

2. Do you like eating halo-halo? Whenever you eat halo-halo, can you distinguish the nata de coco from the garbanzos? How about the red beans from the langka ? How and why can you distinguish them from one another? The ingredients in a halo-halo do not change their taste and color even after being mixed together. This happens because they retain their properties. In the previous lesson, you have learned that mixture is a combination of two or more substances. When the combined substances are not evenly spread throughout, as in halo-halo, the mixture is said to be heterogeneous.

3. Let’s Learn A heterogeneous mixture is a mixture that has a non-uniform composition. In this type of mixture, the physical properties of each substance are distinct from one another. This mean that you can identify the separate components if you examine a sample of a heterogeneous mixture. This is possible because each component or substance in this mixture retains its individual properties.

4. Characteristics of Heterogeneous Mixture 1. The substances of heterogeneous mixtures are not in any sort of fixed ratio. If you have a large bucket of water and add pebbles into the water, the mixture will simply be a mixture of both water and pebbles. At no point, no matter how much water and pebbles you add to the mixture, does the mixture itself change.

5. 2. The components or substances in heterogeneous mixtures maintain their own individual properties. The properties of the substances never change. Using the same example above, the water and pebbles, even when mixed together, the water still remains water and the pebbles still pebbles. Also, if you are to make a bowl of vegetable soup and add various ingredients in it, then the different ingredients will remain the same despite being mixed together into the soup.

6. 3. The substances of heterogeneous mixtures can be separated through physical means. Separating mixtures physically simply means to move the substances of t he mixture apart from one another without changing them on the chemical level. In the case of the water and pebbles, you can easily just filter the water out and leave the bucket full of pebbles in order to separate them from one another. As for the water absorbed by the pebbles, you can let it evaporate so that you can eventually get pure pebbles again. This can also be done in the case of the vegetable soup. You can separate its components even after they have all been mixed together.

7. Different Kinds of Heterogeneous Mixtures Heterogeneous mixtures are classified based on the phase of matter that they are in. There are three phases of matter ---solid, liquid, and gas. 1. Suspensions – Is a mixture that consists of a liquid and particles of a solid. In this kind of mixture, the particles do not get dissolved. Instead, they are dispersed throughout the liquid after the particles and the liquid get mixed up together. Hence, they can be described as “suspended” in the liquid. Settling of solid particles and separating over time if left alone is another key characteristic of a suspension.

8. 2. Colloids - Is a mixture that consist of an even distribution of very small particles of one substance throughout another substance. Colloids have very similar appearance with solutions. However, instead of being fully dissolved, the particles of a colloid are suspended. As compared to suspensions, the particles in colloids will not settle at the bottom over a period of time. These particles will stay suspended or float. Colloids are classified heterogeneous mixtures. However, they also have some qualities of a homogeneous mixture. Some examples of colloids are glue, gelatin dessert, paint, smoke, milk, aerosol spray, blood, and marshmallow.

9. 3. Emulsions – Is a mixture that consists of a colloidal suspension of one liquid in another liquid which can normally unmixable or unblendable . This means that emulsions have the ability to separate into their individual components if allowed to sit long enough. Face creams, mayonnaise, soapy water, and salad dressings made by shaken oil and vinegar are some examples of emulsions.

10. Uses of Heterogeneous Mixtures Soil. It is a combination of many different elements which are not uniform. Food that you eat. Examples: pizza, salad, soup and many more Soda. It has water, sugar and carbon dioxide which forms bubbles. Emulsions. It use for cosmetics products, pharmaceutical industry for making medicines. Emulsions can be use also in hair care products, in color photography, pesticides and fungicides production, paints and inks.

11. Thank You