Chapter Review. UNDERSTANDING KEY IDEAS Multiple Choice. Skills Worksheet. Name Class Date
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1 Skills Worksheet Chapter Review USING KEY TERMS Complete each of the following sentences by choosing the correct term from the word bank. compound element suspension solubility solution metal nonmetal solute 1. A(n) has a definite ratio of components. 2. The ability of one substance to dissolve in another substance is the of the solute. 3. A(n) can be separated by filtration. 4. A(n) is a pure substance that cannot be broken down into simpler substances by chemical means. 5. A(n) is an element that is brittle and dull. 6. The is the substance that dissolves to form a solution. UNDERSTANDING KEY IDEAS Multiple Choice 7. Which of the following increases the solubility of a gas in a liquid? a. increasing the temperature of the liquid b. increasing the amount of gas in the liquid c. decreasing the temperature of the liquid d. decreasing the amount of liquid 8. Which of the following best describes chicken noodle soup? a. element c. compound b. mixture d. solution 9. Which of the following statements describes elements? a. All of the particles in the same element are different. b. Elements can be broken down into simpler substances. c. Elements have unique sets of properties. d. Elements cannot be joined together in chemical reactions. 10. A solution that contains a large amount of solute is best described as a. insoluble. c. dilute. b. concentrated. d. weak. Holt Science and Technology 32 Elements, Compounds and Mixtures
2 11. Which of the following substances can be separated into simpler substances only by chemical means? a. sodium c. water b. salt water d. gold 12. Which of the following would not increase the rate at which a solid dissolves? a. decreasing the temperature b. crushing the solid c. stirring d. increasing the temperature 13. In which classification of matter are components chemically combined? a. a solution c. a compound b. a colloid d. a suspension 14. An element that conducts thermal energy well and is easily shaped is a a. metal. b. metalloid. c. nonmetal. d. None of the above Short Answer 15. What is the difference between an element and a compound? 16. When nail polish is dissolved in acetone, which substance is the solute, and which is the solvent? Math Skills 17. What is the concentration of a solution prepared by mixing 50 g of salt with 200 ml of water? Show your work below. Holt Science and Technology 33 Elements, Compounds and Mixtures
3 18. How many grams of sugar must be dissolved in 150 ml of water to make a solution that has a concentration of 0.6 g/ml? Show your work below. CRITICAL THINKING 19. Concept Mapping Use the following terms to create a concept map: matter, element, compound, mixture, solution, suspension, and colloid. Holt Science and Technology 34 Elements, Compounds and Mixtures
4 20. Forming Hypotheses To keep the fizz in carbonated beverages after they have been opened, should you store them in a refrigerator or in a cabinet? Explain. 21. Making Inferences A light green powder is heated in a test tube. A gas is given off, and the solid becomes black. In which classification of matter does the green powder belong? Explain your reasoning. 22. Predicting Consequences Why is it desirable to know the exact concentration of solutions rather than whether they are concentrated or dilute? 23. Applying Concepts Describe a procedure to separate a mixture of salt, finely ground pepper, and pebbles. Holt Science and Technology 35 Elements, Compounds and Mixtures
5 INTERPRETING GRAPHICS Dr. Sol Vent did an experiment to find the solubility of a compound. The data below were collected using 100 ml of water. Use the table below to answer the questions that follow. Temperature (ºC) Dissolved solute (g) Use a computer or graph paper to construct a graph of Dr. Vent s results. Examine the graph. To increase the solubility, would you increase or decrease the temperature? Explain. 25. If 200 ml of water were used instead of 100 ml, how many grams of the compound would dissolve at 40 C? 26. Based on the solubility of this compound, is this compound a solid, liquid, or gas? Explain your answer. Holt Science and Technology 36 Elements, Compounds and Mixtures
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