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Mixtures,Elements , Compounds with Physical and Chemical Changes QUIZ REVIEW

Mixtures,Elements , Compounds with Physical and Chemical Changes QUIZ REVIEW. Admit Slip. Is ground turkey an element, compound, or a mixture? Is it a pure substance? If you freeze the turkey, is that a physical or chemical change?

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Mixtures,Elements , Compounds with Physical and Chemical Changes QUIZ REVIEW

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  1. Mixtures,Elements, Compounds with Physical and Chemical Changes QUIZ REVIEW

  2. Admit Slip • Is ground turkey an element, compound, or a mixture? • Is it a pure substance? • If you freeze the turkey, is that a physical or chemical change? • If you cook the turkey, is that a physical or chemical change?

  3. Today’s Objectives • You will be able to: • Compare and contrast mixtures, elements and compounds • Compare and contrast heterogeneous and homogeneous mixtures • Compare and contrast physical and chemical changes • Use states of matter to describe what is happening in a chemical reaction

  4. Agenda • Admit Slip • Homework Check/Review • Work on Quiz Review • Review Answers to Quiz Review

  5. Homework Review 1. Label the products and reactants in the following chemical equation: HCl(aq) + NaHCO3(aq) NaCl(aq) + H2O(l) + CO2(g) ReactantsProducts 2. In the law of conservation of mass, the mass must A. change B. double C. cut in half D. stay the same

  6. Homework Review 3. Label the following as a mixture, element, or compound. a) N2 gas Element b) syrup Mixture c) sugar, C2H22O11Compound d) strawberry milk Mixture 4. Label the following as homogeneous or heterogeneous mixtures. a) toothpaste Homogen. Mixture b) beef chili Heterogen. Mixture c) peanut butter and jelly sandwich Heterogen. Mixture d) orange juice Homogen. Mixture (without pulp)

  7. Homework Review 5. Label the following as physical or chemical changes. a) cutting tomatoes Physical change b) baking potatoes Chemical change c) boiling water Physical change d) freezing water Physical change e) sugar water with yeast rises into a dough Chemical change

  8. Quiz Review • Your completed quiz review is due at:

  9. Quiz Review Answers • Heterogenousand homogeneous • Elements and compounds are the 2 types of pure substances • B a heterogeneous mixture has more than one phase • C the composition of a mixture can vary; pure substances have a fixed comp. • C evaporation is a way to separate some mixtures

  10. Quiz Review Answers • C a homogeneous mixture • B salt and water can be separated by a physical process • a) hetereog. b) homog. c) homog. d) heterog. • homog. has 1 phase heterog. has 2 or more phases • Distillation is used to C separate mixtures by boiling points.

  11. Quiz Review Answers • Mixtures are sep. by a physical process • Compounds can be broken down by a chemical reaction • Elements can be broken down by a nuclear reaction • D elements can not be broken by chemical reactions, but compounds can • B sugar is isolated from sugar water by evaporation

  12. Quiz Review Answers • B salt crystals dissolving in water • paint:MIX ca: ELE air: MIX CO2: COM flu:ELE water:COMpaper:MIXm&c:MIXLi:ELENaOH:COM tothpt:MIX V:ELEorangj: MIXsugar:COMgreink:MIX • Meat rotting: PHYSCH4 + O2 CO2 + H2O : CHEM freezing water: PHYS salt dissolving: PHYS burning charcoal: CHEM water evaporating: PHYS

  13. Quiz Review Answers • a) water boiling is a physical change b) an egg cooking is a chemical change • HCl(aq) + NaHCO3(aq) NaCl(aq) + H2O(l) + CO2(g) ReactantsProducts • C NaCl dissolved in water to make a solution • C aqueous • A solid • C gas

  14. Quiz Review Answers • B liquid • B bubbles of gas forming • D stays the same

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