A 2, 6, 3, 6 B 1, 3, 2, 3 C 1, 1, 2, 2 D 1, 1, 2, 1

Transcription

1 North arolina Testing Program EO hemistry Sample Items Goal 5 1. onsider this reaction: NH ( g) + Hl( g) NH l( s) 3 4 Which type of reaction does this equation represent? 4. When NaO reacts with HO, what is produced? HNaO Na + H O combustion NaO + H decomposition NaOH single replacement synthesis 5. Which equation is correctly balanced?. Which equation represents a single replacement reaction that can occur? F+ Nal NaF + l l+ NaF Nal + F u + HSO4 uso 4+ HO+SO Na + HO NaOH + H Fe + 3O FeO3 4u + S 8 8uS u + Nal ul + Na Zn + NaF ZnF + Na 3. What products are formed when the metal potassium is added to water? K and HO KOH and HO KO and H 6. What coefficients are required to balance this equation? _FeO 3 + _O _Fe + _O, 6, 3, 6 1, 3,, 3 1, 1,, 1, 1,, 1 KOH and H Page 1 Published January 008. May reproduce for instructional and

2 North arolina Testing Program EO hemistry Sample Items Goal 5 7. n aqueous solution of silver nitrate is added to an aqueous solution of iron(ii) chloride. Which is the net ionic equation for the reaction that occurs? + + gno ( aq) Fel ( aq) gl( s) FeNO ( aq) + + ( ) gno ( aq) Fel ( aq) gl ( s) Fe NO ( aq) g ( aq) + NO ( aq) + Fe ( aq) + l ( g) gl( s) + g ( aq) + l ( aq) gl ( s) 8. Which example indicates that a chemical change has occurred? When two aqueous solutions are mixed, a precipitate is formed. s ammonium nitrate dissolves in water, it causes the temperature of the water to decrease. lcohol evaporates when left in an open container. Water is added to blue copper(ii) chloride solution. The resulting mixture is lighter blue in color. Page Published January 008. May reproduce for instructional and

3 North arolina Testing Program EO hemistry Sample Items Goal 5 9. onsider this chemical equation: NH ( aq) + Hl( aq) NH ( aq) + l ( aq) In this reaction, why is the ammonia considered a base? NH3 increases the hydronium ion concentration. NH3 decreases the hydroxide ion concentration. NH3 accepts a proton. NH3 donates a proton. 10. Phenophthalein is an indicator that turns pink when added to a basic solution. In which solution would phenolphthalein turn pink? NaOH Hl HO Nal 1. What is the ph of a solution of KOH with a hydroxide concentration of OH = 1 10 M? [ ] water sample was found to have a ph of 6 at 5. What is the hydroxide concentration in the water sample? M M M 13. In a titration experiment, if 30.0 ml of an Hl solution reacts with 4.6 ml of a 0.50-M NaOH solution, what is the concentration of the Hl solution? 0.41 M 0.61 M 1.5 M 370 M M Page 3 Published January 008. May reproduce for instructional and

4 North arolina Testing Program EO hemistry Sample Items Goal What is the oxidation number of the chromium atom in the ro 7 ion? 15. onsider this oxidation-reduction reaction: 16H + MnO + 5Sn 5Sn + Mn + 8H O Which represents the oxidation half-reaction? 4 Sn + + e Sn Mn + 4e Mn Sn Sn + e + Mn Mn + e 16. This balanced equation represents a chemical reaction: Which substance undergoes reduction? 3g + 4HNO3 3gNO3 + NO + HO 0 g + H 5+ N O Page 4 Published January 008. May reproduce for instructional and

5 North arolina Testing Program EO hemistry Sample Items Goal onsider this chemical equation: gr ( s) + energy g ( s) + r ( l) 19. For the reaction aq + aq s + ( ) ( ) ( ) Which is true about the reaction? Silver is reduced. increasing the temperature increases the rate of the reaction. Which is the best explanation for this happening? romine is reduced. Silver loses electrons. The pressure increases, which in turn increases the production of products. romine gains electrons. The concentration of reactants increases with an increase in temperature. 18. onsider this balanced chemical equation: H O ( aq) H O ( l) + O ( g) Which will increase the rate of the reaction? The average kinetic energy increases, so the likelihood of more effective collisions between ions increases. Systems are more stable at high temperatures. increasing pressure on the reaction decreasing concentration of the reactants adding a catalyst to the reaction decreasing the temperature of the reaction Page 5 Published January 008. May reproduce for instructional and

6 North arolina Testing Program EO hemistry Sample Items Goal 5 0. Which statement explains why the speed of some reactions is increased when the surface area of one or all the reactants is increased? increasing surface area changes the electronegativity of the reactant particles increasing surface area changes the concentration of the reactant particles increasing surface area changes the conductivity of reactant particles increasing surface area enables more reactant particles to collide End of Goal 5 Sample Items In compliance with federal law, including the provisions of Title IX of the Education mendments of 197, the epartment of Public Instruction does not discriminate on the basis of race, sex, religion, color, national or ethnic origin, age, disability, or military service in its policies, programs, activities, admissions or employment. Page 6 Published January 008. May reproduce for instructional and

7 EO hemistry Goal 5 Sample Items Key Report 1 Objective: 5.01 Evaluate various types of chemical reactions. a. nalyze reactions by types: Single replacement, double replacement (including acidbase neutralization), decompostion, synthesis, and combustion of simple b. predict products Thinking Skill: pplying orrect nswer: Objective: 5.01 Evaluate various types of chemical reactions. a. nalyze reactions by types: Single replacement, double replacement (including acidbase neutralization), decompostion, synthesis, and combustion of simple b. predict products Thinking Skill: nalyzing orrect nswer: 3 Objective: 5.01 Evaluate various types of chemical reactions. a. nalyze reactions by types: Single replacement, double replacement (including acidbase neutralization), decompostion, synthesis, and combustion of simple b. predict products Thinking Skill: nalyzing orrect nswer: 4 Objective: 5.01 Evaluate various types of chemical reactions. a. nalyze reactions by types: Single replacement, double replacement (including acidbase neutralization), decompostion, synthesis, and combustion of simple b. predict products Thinking Skill: nalyzing orrect nswer: 5 Objective: 5.0 pply the law of conservation of matter to the balancing of chemical equations. Thinking Skill: pplying orrect nswer: 6 Objective: 5.0 pply the law of conservation of matter to the balancing of chemical equations. Thinking Skill: nalyzing orrect nswer: 7 Objective: 5.0 pply the law of conservation of matter to the balancing of chemical equations. Thinking Skill: nalyzing orrect nswer: 8 Objective: 5.03 Identify the indicators of chemical change: Page 1 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

8 EO hemistry Goal 5 Sample Items Key Report a. Formation of a b. Evolution of a c. olor d. bsorption or release of heat. Thinking Skill: pplying orrect nswer: 9 Objective: 5.04 Identify the physical and chemical behaviors of acids and bases. a. General properties of acids and b. Ionization and the degree of dissociation (strengths) of acids and bases. c. Indicators, acid-base titration, and/or ionization and the degree of dissociation (strengths) of acids and d. oncentration and dilution of acids and bases, and/or ph and e. cid-base f. ph and poh. Thinking Skill: nalyzing orrect nswer: 10 Objective: 5.04 Identify the physical and chemical behaviors of acids and bases. a. General properties of acids and b. Ionization and the degree of dissociation (strengths) of acids and bases. c. Indicators, acid-base titration, and/or ionization and the degree of dissociation (strengths) of acids and d. oncentration and dilution of acids and bases, and/or ph and e. cid-base f. ph and poh. Thinking Skill: Knowledge orrect nswer: 11 Objective: 5.04 Identify the physical and chemical behaviors of acids and bases. a. General properties of acids and b. Ionization and the degree of dissociation (strengths) of acids and bases. c. Indicators, acid-base titration, and/or ionization and the degree of dissociation (strengths) of acids and d. oncentration and dilution of acids and bases, and/or ph and e. cid-base f. ph and poh. Thinking Skill: pplying orrect nswer: 1 Objective: 5.04 Identify the physical and chemical behaviors of acids and bases. a. General properties of acids and b. Ionization and the degree of dissociation (strengths) of acids and bases. c. Indicators, acid-base titration, and/or ionization and the degree of dissociation Page Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

9 EO hemistry Goal 5 Sample Items Key Report (strengths) of acids and d. oncentration and dilution of acids and bases, and/or ph and e. cid-base f. ph and poh. Thinking Skill: pplying orrect nswer: 13 Objective: 5.04 Identify the physical and chemical behaviors of acids and bases. a. General properties of acids and b. Ionization and the degree of dissociation (strengths) of acids and bases. c. Indicators, acid-base titration, and/or ionization and the degree of dissociation (strengths) of acids and d. oncentration and dilution of acids and bases, and/or ph and e. cid-base f. ph and poh. Thinking Skill: pplying orrect nswer: 14 Objective: 5.05 nalyze oxidation/reduction reactions with regard to the transfer of electrons. a. ssign oxidation numbers to elements in REOX reactions, and /or assess the practical applications of oxidation and reduction b. Identify the elements oxidized and c. Write simple half d. ssess the practical applications of oxidation and reduction reactions. Thinking Skill: nalyzing orrect nswer: 15 Objective: 5.05 nalyze oxidation/reduction reactions with regard to the transfer of electrons. a. ssign oxidation numbers to elements in REOX reactions, and /or assess the practical applications of oxidation and reduction b. Identify the elements oxidized and c. Write simple half d. ssess the practical applications of oxidation and reduction reactions. Thinking Skill: nalyzing orrect nswer: 16 Objective: 5.05 nalyze oxidation/reduction reactions with regard to the transfer of electrons. a. ssign oxidation numbers to elements in REOX reactions, and /or assess the practical applications of oxidation and reduction b. Identify the elements oxidized and c. Write simple half d. ssess the practical applications of oxidation and reduction reactions. Thinking Skill: nalyzing orrect nswer: Page 3 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

10 EO hemistry Goal 5 Sample Items Key Report 17 Objective: 5.05 nalyze oxidation/reduction reactions with regard to the transfer of electrons. a. ssign oxidation numbers to elements in REOX reactions, and /or assess the practical applications of oxidation and reduction b. Identify the elements oxidized and c. Write simple half d. ssess the practical applications of oxidation and reduction reactions. Thinking Skill: nalyzing orrect nswer: 18 Objective: 5.05 nalyze oxidation/reduction reactions with regard to the transfer of electrons. a. ssign oxidation numbers to elements in REOX reactions, and /or assess the practical applications of oxidation and reduction b. Identify the elements oxidized and c. Write simple half d. ssess the practical applications of oxidation and reduction reactions. Thinking Skill: nalyzing orrect nswer: 19 Objective: 5.06 ssess the factors that affect the rates of chemical reactions: a. The nature of the reactants. b. Temperature. c. oncentration. d. Surface rea e. atalyst. Thinking Skill: nalyzing orrect nswer: 0 Objective: 5.06 ssess the factors that affect the rates of chemical reactions: a. The nature of the reactants. b. Temperature. c. oncentration. d. Surface rea e. atalyst. Thinking Skill: nalyzing orrect nswer: Page 4 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.