Solutions And Suspensions Worksheet Answers

Solutions And Suspensions Worksheet Answers – 1 Film Special Effects Activity 3 Solutions, Suspensions and Colloids Objectives In this exercise you will: Learn different ways to combine materials to make new materials. Try a few ingredients to determine what compounds they are. Determine why certain types of compounds are produced for commercial use in certain situations. what do you think One way to get different types of ingredients is to simply mix them. Many different things can happen when ingredients are mixed. Each type of mixture has its own characteristics. Is it easier to separate milk from coffee or milk from a bowl of cereal? Record your thoughts on this question in your active chemistry journal. Be prepared to discuss your answers with your small group and class. Learning 1. Half fill six large test tubes with water. Number the tubes. a) Prepare a table for your observation in the journal “Active Chemistry”. You can use a table like the one on the next page. Safety glasses and lab coat are required for this work. Wipe up spills immediately. Report broken or broken glassware to your teacher. Active Chemistry 338

2 Tasks 3 Solutions, suspensions and colloids # Mixed ingredients Observation after mixing Observation #1 before mixing with water Observation #1 Water only # 2 0.5 g sugar # 3 milk drop # 4 Filter water 2. Place the following ingredients in the test tube . : #1 Nothing #2 0.5g Sugar #3 A Few Drops of Milk #4 0.5g CuSO4 (Copper Sulfate) #5 2ml Olive Oil #6 0.5g Clay A) Mix each of the ingredients before mixing. 3. Close each test tube with stoppers. Place your finger on the cork and shake each for a few minutes to get the mixture. Keep track of each mix. 4. Consider the following properties of mixtures: What does each mixture look like after intensive mixing? Which of them contains visible suspended particles? Which of them look exactly alike (similar)? Which mixtures separate (are heterogeneous) after vigorous shaking for several minutes? Which one remains mixed? Shine a laser pointer through each mixture. In which compounds are laser beams clearly visible? In which mixture does it undergo less impact? For each mixture, place a small beaker under the funnel to capture the filtrate as shown in the figure on the next page. Pour the contents of each test tube into a funnel lined with filter paper. Do the mixtures pass? Which filter leaves it on the paper? Never look directly at the laser beam. 339 Integrated Science for the 21st Century

Solutions And Suspensions Worksheet Answers

Solutions And Suspensions Worksheet Answers

3 Film Special Effects a) Record all your observations in your journal chart. Funnel b) Classify each mixture as a solution, colloid or suspension using your information from the ChemTalk reading section and description of mixture types. 5. Dispose of materials and return all equipment as instructed by the instructor. Clean the station and wash your hands. Classification of Compounds Chemistry term Pure substance: A substance that contains only one type of particle. Solution: A homogeneous mixture of two or more substances. Solute: A substance that dissolves in a solvent to form a solution. Solvent: A solute dissolves to form a solution. In this exercise, you mix water and several different ingredients to make different mixtures. In some cases, the ingredients you used were pure substances. A pure substance has only one kind of particle. For example, sugar is a pure substance. The mixture contains at least two pure substances. You may think of water as a pure substance, but most of the water found in nature consists of various substances mixed in and is actually a mixture. Most materials found in nature, as well as most man-made materials, are mixtures of one or more pure substances. When you add sugar to water, you create a mixture called a solution. The dissolved particles in the solution are so small that they cannot be seen with the naked eye. The mixture is said to be homogeneous. The dissolved particles (called solutes) are continuously mixed with the solvent. Water, because it dissolves in this case, is considered a solvent. If the solution is filtered, everything will pass. Light passing through the solution has no special effect. When you add milk to water, the water becomes cloudy. However, small drops of milk remained hanging in the water and did not move. Active Chemistry 340

Wise Owl Middle School Physical Science: Week 7 September 13,2018

4 Functions 3 Solutions, suspensions and colloids settle over time. You could see the laser beam passing through the mixture, and when you filter the mixture, it all passed through the filter paper. This mixture is a colloid. In colloids, the dispersed particles are larger than in the solution and can be closely observed under a microscope. The particles also remain suspended indefinitely. All parts of the colloid pass through the filter. When light passes through the colloid, it is scattered and you can see where the light beam is going. This is known as the Tyndall effect. When you add clay to water, you create a solution. is the largest of all the dispersed particles in a suspension. Particles appear and settle over time. Suspended particles can be separated by filtration. The mixture is called heterogeneous. Light passing through the pendant may be diffused, but the pendant is clearly opaque. Chemical term colloid: A mixture containing particles larger than the solute but small enough to be suspended in a continuous phase of another component. It is also called colloidal dispersion. Tyndall Effect: Scattering of light as it passes through a colloid. Suspension: A heterogeneous mixture consisting of small solid or liquid particles in a self-disposing liquid. When the container is shaken, they disperse into the liquid again. Test 1. Explain in your own words how you can differentiate between solution, colloid and suspension. 2. What is the Tyndall Effect? 341 Integrated Science for the 21st Century

5 Movie special effects exercise and assignment feedback. In this exercise, you made a mixture of a solid or liquid solute and water as the solvent. The same basic principles apply regardless of the state of matter. For example, you can have concrete solutions. Such solutions are metal alloys such as brass or bronze. Fog, smoke and clouds are compounds that exhibit the Tyndall effect. A common phase effect is the formation of smoke or fog to create an eerie atmosphere. Many films have used the Tyndall effect to show the path of a laser beam or light. An easy way to achieve this effect is to use a water sprayer to spray the air in a dark room (allergy/asthma problem). When a light or laser pointer is directed through the fog, it is clearly visible due to the Tyndall effect. 1. Classify each of the following substances as suspension, colloid or solution. Make your point clear. (Hint: In some cases, more than one answer is possible.) a) The mixture is put through a filter and the entire mixture passes through it. b) The mixture is allowed to stand for some time and the fine particles settle. c) When examined under a microscope, small particles are visible in the mixture. d) Light passing through the mixture is scattered. e) Mixed blue and transparent. 2. Suggest a method for the separation of different substances in each of the following mixtures: a) solution b) colloids c) suspension 3. In some days you can clearly see sunlight passing through cracks in the clouds . , What could be the reason for this difference in the atmosphere? 4. The word “identical” means the same or similar. Asymmetry means that different parts of the mixture are clearly visible. In this exercise classify each mixture as homogeneous or heterogeneous. 5. Explore your home kitchen and choose from five products. Take your best guess as to what type of mix they represent. Open the evidence used by you to classify the products into the appropriate category. Explain what would happen if each product you chose contained a different type of mixture. For example, if milk is a suspension rather than a colloid, it will solidify. Active Chemistry 342

6 Task 3 Solutions, suspensions and colloids Preparing for the unit task Consider how the properties of a solution, colloid, or suspension can be used to create a special effect for a scene in a film. In a few sentences, set the scene and describe the mood you want to create. In a paragraph or two, describe the chemistry needed to understand the differences between the different types of compounds and how they produce specific effects. Request for further food and mix preparation

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