Chemistry
RoxiStevGraded Assignment SCI303B/304B: Chemistry | Unit 2 | Lesson 10: Unit Test
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Graded Assignment
Unit Test, Part 2
Answer the questions below. When you have finished, submit this assignment to your teacher by the due date for full credit.
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1. Most fruit juices are a solution of water, sugar, and fruit-specific chemicals. In this solution, identify the solvent and solutes.
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2. Explain collision theory and discuss how it can be used to explain why powdered sugar will dissolve in water faster than a cube of sugar.
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3. Discuss the difference between molarity and molality, state the units of each, state the symbol for each, and give an example of how each can be used when you are determining the concentration of a solution.
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4. Ethylene glycol (C2H6O2) is used as an antifreeze in cars. If 400 g of ethylene glycol is added to 4.00 kg of water, what is the molality? Calculate how much the freezing point of water will be lowered. The freezing-point depression constant for water is Kf = –1.86°C/m. Show your work.
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