Mixtures Chapter 3 Section 3 Pages Vocabulary: 1.Mixture 2.Solution 3.Solute 4.Solvent 5.Concentration 6.Solubility 7.Suspension 8.Colloid

Mixtures p A combination of two or more substances that are not chemically combined 2) Why is this not a Compound? 3) What’s the difference between a compound and a mixture? It did not combine to make a new substance Mixture = same substance Compound=new or chemically altered substance

4) Mixtures can be physically “taken apart” p. 66 Mixtures Made of elements, compounds or both No change in original properties Can be physically separated Formed using any ratio of components It doesn’t matter how many lettuce leaves, onions or croutons you have ………………… 5) Any ratio will work for a salad!!

Common Ways to Separate Mixtures Distillation – a process that separates a mixture based on the boiling points of the components. Here, pure water is being distilled from salt water. Magnets – can be used to separate a mixture of the elements iron and aluminum. Iron is attracted to the magnet, but aluminum is not. Centrifuge – the different parts of blood are separated using a machine called a centrifuge. In the test tube, a layer of plasma rests above a layer of red blood cells. A centrifuge separates the blood by their densities.

These samples of granite are different colors because the granite in each one has different ratios of minerals. A compound is made of elements in a specific mass ratio. However, the components of a mixture do not need to be mixed in a definite ratio. Granite is a mixture of three minerals: feldspar (pink), mica (black), and quartz (white). Even though the proportions of the minerals change, this combination of minerals is always a mixture called granite.

Solutions p. 66 6) A mixture that appears to be a single substance. Isn’t he cute!!!

Dissolving. 66 When particles mix together, separate and spread evenly through out a mixture Kool-Aid Man is an example of substances which mixed together and separated evenly. He’s a Type of mixture called a 7)“solution.”

Substance that Is dissolved!!! Substance that does the dissolving 8) I love Ice cold Water! Can you tell me what the solute and solvent is in my mixture? p. 66

A “solute” must be soluble to be able to dissolved. 9) soluble: able to be dissolved. p. 66

10) Insoluble Unable to dissolve or break down! Clear Cloudy soluble Insoluble Mixture that’s not a solution p. 66

Concentration p ) The amount of solute per solvent Less Concentrated More or higher Concentration 12) Which glass container holds the stronger coffee? A or B A B

Solubility 14) Why will you enjoy the glass of Kool-aid faster if you dissolve the powder in the water before adding the ice cubes? Many solutes will dissolve faster in warmer solvents. 13)Ability of a substance to dissolve in a solvent at different temperatures p. 69

Suspension 15) Particles too big to stay mixed Particles will settle out if left alone Can be separated by passing the substance through a filter. Particles are more or less evenly distributed throughout the liquid or gas

Colloids P ) A mixture where the particles are dispersed throughout but are not heavy enough to settle out. In between a solution and suspension.

Quiz Time 1. Why do substances in a mixture keep their identities? No chemical change has taken place in a mixture. Mixture or Solution? 2. sugar and sandmixture – can be physically separated 3. diet soda solution – gas dissolved in liquid 4. airsolution – gases dissolved in other gases 5. water and oilmixture – can be physically separated 6. chocolate chip cookiemixture – can be physically separated

7. Which of the following is not a solution: air in a scuba tank, muddy water, a soda, or salt water? muddy water 8. When solid iodine is dissolved in alcohol, which is the solute, and which is the solvent? Iodine is the solute and alcohol is the solvent. 9. A mixture a. has substances in it that are chemically combined b. can always be separated using filtration c. contains substances that are not mixed in a definite ratio d. all of the above c. 10. True or False: A suspension is composed of substances that are spread evenly among each other. False - solution

Now you’re a “Mixture” magician