Qualitative Analysis Practice Test (PDF)

SCH 4CI Name: _____ANSWERS_____ Matter & Qualitative Practice Test ** This test is 3 foolscap pages front and back = 5 total pages ** Section Assessment Time (min)...

SCH 4CI Name: _____ANSWERS_____ Matter & Qualitative Practice Test ** This test is 3 foolscap pages front and back = 5 total pages ** Section Assessment Time (min) Mark A, B, C Scan-tron 40 50/ 50 D Short Answer 35 25/ 25 TOTAL SUMMATIVE 75 75/ 75 Part A: True/Fasle [ /10] Indicate whether the sentence or statement is true (a) or false (b). The underlined word or term will make the statement either correct or incorrect ** Choose the best answer and transfer it to your scan-tron card** 1. Qualitative observations are made using your five 12. Electrons are senses.. a. found in the nucleus c. similar in mass to p+ TRUE b. negatively charged d. similar in mass to no 2. X-rays have higher frequency than radio waves. TRUE 13. CO2(g) attached to raisins causing them to 3. The dot diagram shows all e- of an element. rise is an: FALSE a.a. observation c. error 4. The spectra patterns of an incandescent light bulb b. inference d. estimate and a fluorescent light are the same. FALSE 14. The “raisin bun” model of the atom was 5. Ionic compounds conduct electricity when proposed by dissolved in water. a. John Dalton c. Ernest Rutherford TRUE b. J.J. Thomson d. Niels Bohr 6. The nitrate ion (NO3-) is soluble with most positive ions. 15. Emission spectra can be used as a technique TRUE for qualitative analysis because 7. The name of Fe(NO3)3 is iron(III)nitrate. a. each element gives off a distinct spectral TRUE pattern 8. A spectator ion is an ion that is present in the b. a continuous spectrum is produced solution, but does not form a precipitate. c. an absorption spectrum is produced TRUE d. all patterns are the same 9. A precipitation reaction is usually a double 16. In a flame test, potassium will produce the displacement reaction. colour TRUE a.a. green c. violet 10. The prefix for four is penta. b. red d. pink FALSE Part B: Multiple Choice. Select the best choice 17. In a flame test, lithium will produce the that answers the question [ /35] colour a. green c. violet 11. Energy levels were discovered by b.b. red d. pink a. Thomson c. Rutherford b.Dalton d.Bohr 18. The subscript (s) following a compound indicates that the physical state of the material is a. solid c. gas b. liquid d. dissolved in water 1  19. Melting is a a.a. physical property c. both a and b 31. The Lewis symbols of elements down a group of b.b. chemical property d. none of the above the periodic table have a. the same number c. a decreased number of 20. A compound that is able to conduct a current of dots dots when placed in water to form a solution is b. an increased d. an unrelated number of a. a nonelectrolyte c. a conductor number of dots dots b. an electrolyte d. an insulator 32. The correct Lewis symbol for carbon is 21. A compound that has a low melting point and a. c. is a poor conductor of electricity is a. ionic c. elastomer b. d. none of the above b. covalent d. alkane 33. The correct Lewis symbol for phosphorus is 22. When an atom gains valence electrons, a. c. a. a cation is formed c. an ion is formed b. an anion is formed d. a polyatomic ion is b. d. all of the above formed 23. Carbon dioxide is an example of 34. An ion with a -1 charge has a. an ionic compound c. a salt a. one extra e- c. one missing p+ b. an electrolyte d. a covalent b. one missing e- d. one extra p+ compound 35. An ion with a +3 charge has 24. Alkali metals in their outer shell have a. three extra e- c. one missing p+ proton, two a. 1 valence e- c. 7 valence e- extra e- b. 2 valence e- d. 8 valence e- - b. three missing e d. one extra proton, two missing e- 25. If an atom loses two extra electrons, it has a charge of 36. A single covalent bond is formed when a. 2+ c. 1- a. two atoms share two e- - b. 2 d. none of the b. two atoms both lose e- above c. one atom gains e- from the other atom d. the e- are passed back and forth between the 26. In order for the halogens to become stable two atoms they must a. gain 1 electron c. gain 2 electrons 37. Water is b. lose 2 electrons d. lose 1 electron a. a polar molecule c. an ionic compound b. a nonpolar molecule d. a polyatomic ion 27. In order for the alkali metals to become stable they must 38. The molecule methane, CH4, is an example of a a. gain 1 electron c. gain 2 electrons a. polar molecule with c. polar molecule with b. lose 2 electrons d. lose 1 electron nonpolar bonds polar bonds b. nonpolar molecule d. none of the above 28. Calcium is in period with polar bonds a. one c. three b. two d. four 39. A solid that is formed as a result of the chemical reaction of two aqueous solutions is 29. Neon is in group called a a. 1 c. 17 a. residue c. solidification b. 2 d. 18 b. precipitate d. solute 30. When using Lewis symbols, the number of dots represents a. total # of e- c. only the non-valence e- b. only valence e- d. # of e- needed 2 40. For the double displacement reaction that Part C: Matching. Select the best choice that occurs when lead(II) nitrate is mixed with answers the question [ /5] potassium iodide, which of the following is Select the statement that best describes each of the the correct net ionic equation? following words or phrases, and place the a. c. corresponding letter in the space provided next to the statement. b. d. a. Synthesis reaction 41. Using the solubility rules, will a precipitate b. Decomposition reaction form when aqueous potassium chloride is c. Single displacement reaction mixed with aqueous lead(II) nitrate? d. Double displacement reaction a. yes e. Neutralization reaction b. no c. depends on how they are mixed 46. NaOH(aq) + HCl(aq)
NaCl(aq) + H2O(l) E d. impossible to determine with solubility rules 47. 2 NaHCO3(s)
Na2CO3(s) + H2O(l) + CO2(g) B 42. For the single displacement reaction that 48. AB + CD
AC + BD D occurs when Br2(aq) is mixed with sodium iodide, which of the following are the products 49. Mg(s) + 2 HCl(aq)
MgCl2(aq) + H2(g) C a. NaBr(aq) + Br2(aq) c. NaI(aq) + I2(aq) b.NaBr(aq) + I2(aq) d. NaBr(aq) + Br-(aq) 50. Li2O(s) + H2O(l)
2 LiOH(aq) A 43. Which of the following does NOT indicate that a double displacement reaction has occurred? a. gas is formed c. water is made b. a precipitate formed d. light is produced 44. The name of the ions not involved in forming the precipitate is called a. inert ions c. cations b. spectator ions d. anions 45. Which of the following compounds is most likely to conduct electricity? a. CO2 c. NaCl b. NO2 d. CCl4 3 PART D: Short Answer. Answer the following questions in the space provided [ /25] 51. Complete the following double displacement reaction equation by balancing it and adding states (s, l, g, aq). Write the total ionic equation and net ionic equation and identify the spectator ions. [ /1] ____ Ba(NO3)2 (aq) + __2_ NaCl_(aq)_
___ BaCl2_(s)_ + _2_ NaNO3_(aq) Total Ionic Equation [ /2] Ba+2(aq) + 2NO3-1(aq) + 2Na+1(aq) + 2Cl-1(aq)
BaCl2(s) + 2Na+1(aq) + 2NO3-1(aq)
ions
charges Net Ionic Equation [ /1] Ba+2(aq) + 2Cl-1(aq)
BaCl2(s Spectator Ions [ /1] Na+1(aq) , NO3-1(aq) 52. Complete the following table by filling in the blanks [ /5] Name Formula Ionic or Covalent aluminum oxide Al2O3 ionic diphosphorus pentoxide P2O5 covalent fluorine gas F2(g) covalent iron(III)nitrate Fe(NO3)3 ionic carbon monoxide gas CO(g) covalent 4  53. A forensic chemist is given samples of four unidentified solutions. The identities of these solutions could affect the outcome of a court case involving an electrocution. The chemist has potassium iodide, KI(aq), methanol, CH3OH(aq), sulphuric acid, H2SO4(aq), and sodium hydroxide (a base), NaOH(aq). The chemist designs an experiment to identify the chemicals. The chemist dissolves each sample in water and tests the solution with a conductivity apparatus and litmus paper. (Acidic solutions turn blue litmus paper red. Basic solutions turn red litmus paper blue.) Solution Electrical Conductivity Litmus 1 high No change 2 high Blue to red 3 none No change 4 high Red to blue (a) What are the identities of the four substances? [ /4] SOLUTION 1 = __KI___ SOLUTION 2 = __H2SO4____ SOLUTION 3 = __CH3OH___ SOLUTION 4 = __NaOH__ (b) Which of the solutions could not have been used in the electrocution? [ /1] CH3OH 54. BALANCE and then CLASSIFY each of the following reactions as a synthesis, decomposition, single displacement, or double displacement reaction: [ /6] (a) __2_Mg(s) + ____O2(g)
_2_MgO(s) ___synthesis____ (b) _2__NaHCO3(s)
____Na2CO3(s) + ____H2O(l) + ____CO2(g) ___decomposition_______ (c) _2_KI(aq) + ____Pb(NO3)2(aq)
____PbI2(s) + _2_KNO3(aq) __double displacement___ 55. Complete the following chart. [ /4] Compound ∆EN Lewis Diagram 3-D Structural Formula Molecular (show partial charges if Shape present) (name) δ+ H H C 2.55 δ+ δ+ H 2.20 δ- tetrahedral CH4 H C H C 0.35 H H H+ δ H 5