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? If you cook the turkey, is that a physical or chemical change?

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

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

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

Homework Review 3. Label the following as a mixture, element, or compound. a) N2 gas Element b) syrup Mixture c) sugar, C2H22O11 Compound 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)

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

Quiz Review Your completed quiz review is due at:

Quiz Review Answers Heterogenous and 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

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.

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

Quiz Review Answers B salt crystals dissolving in water paint:MIX ca: ELE air: MIX CO2: COM flu:ELE water:COM paper:MIX m&c:MIX Li:ELE NaOH:COM tothpt:MIX V:ELE orangj: MIX sugar:COM greink:MIX Meat rotting: PHYS CH4 + O2  CO2 + H2O : CHEM freezing water: PHYS salt dissolving: PHYS burning charcoal: CHEM water evaporating: PHYS

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) Reactants Products C NaCl dissolved in water to make a solution C aqueous A solid C gas

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