University:
Cornell University
Course:
CHEM 2070 | General Chemistry I
Academic year:

2019
Views:

294

Pages:

14
Author:

Tomosovxiw

Title: "Polyatomic ion quiz" Table: A table with two columns: Name: Lists the names of various polyatomic ions. Formula (with charge): Provides the chemical formulas and charges for the corresponding polyatomic ions. Grading Information: "Quiz Th + Fri" indicates that the quiz will be held on Thursday and Friday. "Better of the two grades" suggests that the higher of the two grades will be considered. "If both 100% - E.C in quiz grade" implies that extra credit will be awarded if both Thursday and Friday's quizzes are scored 100%. NAMING IONIC COMPOUNDS I Jonic compounds are named by the following simple rule: Name the cation; then name the anion. For example, NaCl is named sodium chloride. "NaCI" is the formula for the compound; "sodium chloride" is the name of the compound. Notes: 1. Cations are positive ions. The sodium ion is Na'. 2. Anions are negative ions. The chloride ion is CI. 4. Metals form cations, e.g, K*, Mg* %. A netalital is ends sin with the a rof the iotal. A sailer ion. 8. Subscripts in the formula do not appear in the name. Cal, is named calcium chloride. Al,O, is named aluminum oxide. You should be able to name the following: a. Nal b. KBr c. M8F2 d. CaO e. BaS f. Caly g. AlCl, h. Na,O i. LigN j. ZnS k. AIN 1. AgCl m. KF n. Al,S, Answers are on the other side. o. Bel, p. ZaBr, q. CaF2 г. A820 s. BaO t. Na,P Polyatomic Ions • Polyatomic ions are groups of atoms covalently bonded together that act as a single ion polyatomi on you men to in incling charge : Nitrate: NO, Hydroxide: OH Writing names : Name the catic lon then then, simply name the polyatomic lon wilhout the-lide ending: : Ex: NaNO, Theme se more than two capital eters so must have a polyatomic lon. • Ex: Alz (504) • Name: aluminum sulfate • Ex (N Name: ammonium phosphate Writing the formula • Use the same rules as other lonic compounds. The rules of blinary compounds and transition metals still apply. • Ex: Iron (Il) sulfate Tomas 2 charge, site as - 2 • Ex: Iron (lI) sulfate o Iron has a +3 charge, sulfate has a -2 Try these 1. Sodium nitrate 2. Aluminum phosphate 3. Potassium phosphate 4. Ammonium sulfide 5. Chromium (Il) carbonate 6. Magnesium hydroxide 7. Cobalt (Il) carbonate 8. Iron (Il) hydroxide 9. Ammonium carbonate 10. Zinc phosphate answers 11. NaNO, 12. AIPO, 13. K,PO. 14. (NH.),S 15. Cr, (CO,), 16. Mg(OH)2 17. CoCO, 18. Fe(OH)2 19. (NHa), CO, 20. Zn, (PO,)2 Name Hour Writing Formulas/Nomenclature Practice Determine whether each compound is ionic or covalent and then write the formula 1. Na2CO3 Sodium carbonate 2. P205 diphosphorous pentoxide 3. NH3 nitrogen trihydride 4. FeSO4 iron (11) sulfate 5. SIO2 Silicon dioxide 6. Galla galium chloride 7. Cobra Cobalt (11) bromide 8. B₂H₄ liboron tetrahydride 9. co carbon monoxide 10. Pa phosphorous 11. NaBr sodium bromide 12. Ca(C₂H₂O2)2 Calcium acetate 13. P20s diphosphorous pentoxide 14. Ti (SO₂) titanium (IV) sulfate 15. FePO, Iron (111) phosphate 16. K₂N potassium nitride 17.50, sulfur dioxide 18. CUOH Copper (1) hydroxide 19. Zn(NO2)2 zinc nitrite 20. V259 vandium (111) sulfide 21. BBгэ boron tribromide 22. CaSO4 calcium sulfate 23. C₂Brs dicarbon hexabromide 24. Cr(CO3)3 chromium (111) carbonate 25. Agap silver phosphile 26.102 lodine diox icle 27. VO₂ vandium (IV) Oxide 28. PbS lead (11) sulfile. 29. CH. Carbon tetra hydride 30. N203 dinitrogen trioxide Determine whether each formula is ionic or covalent and write the name 31. tetraphosphorus triselenide P4 Se 3 32. potassium acetate KC2H3 02 33. iron (II) phosphide Fe3 P2 34. disilicon hexabromide Siz Bro 35. titanium (IV) nitrate Ti (NO3)4 36. diselenium diiodide Se212 37. copper (1) phosphate CU3PO4 38. gallium oxide Ga203 39. tetrasulfur dinitride SA N2 40. phosphorus Pa 41. silicon dioxide SiOz 42. nickel (III) sulfide NizS3 43. manganese (II) phosphate MN3 (PO4)2 44. silver acetate Ag (24302 45. diboron tetrabromide B2 Bra 46. magnesium sulfate MgSO4 47. potassium carbonate K2(03 48. ammonium oxide (NH4)20 49. tin (IV) selenide Sn. Sez 50. carbon tetrachloride CC14 51. dinitrogen trioxide N203 52. nitrogen dioxide, NO2 53. methane CHA 54. lithium acetate L1 C2H3D2 55. phosphorus trifluoride PF3 56. vanadium (V) oxide V205 57. aluminum hydroxide Al(OH)3 58. zinc sulfide 59. silicon tetrafluoride SIFA 60. silver phosphate Agz P04 WRITING IONIC FORMULAS I Formulas for ionic compounds are written by these rules: Rule 1 Write the formula (symbol) for the cation (without the charge) followed by a subscript; write the formula (symbol) for the anion (without the charge) followed by a subscript. Rule 2 Subscripts are chosen so that the charges in a compound add to zero. Notes: . The charges on the ions must be known before the formula can be written. 1 The ionic charges are as follows: Group IA metals always form +1 ions: Li, Na, K, etc. Group IIA metals always form 1+2 ions: Be, Mg2+, Ca2+, Ba2, etc. Aluminum (in IIIA) always forms a +3 ion: Al³*. Zinc (in IIB) always forms a +2 ion: Zn²*. Silver (in IB) always forms a +1 ion: Ag. Group VIIA always form-1 ions: F, СГ, Вг, Г. Group VIA always form -2 ions: O2, S2 Group VA always form -3 ions: N³, P. 2. The subscript after the ionic formula indicates the number of those ions in the compound. 3. A subscript of one (1) is not written. 4. The cation charge times its subscript plus the anion charge times its subscript must equal zero. 5. Usually the subseripts-ean-be-determined by making the charge on an anion the subscript on the cation (leave off the minus sign) and making the charge on the cation the subscript on the anion. 6. Subscripts should be reduced to the lowest integer numbers. To write the formula for magnesium fluoride, Determine the charges; magnesium ion is Mg2+ and the fluoride ion is F". Try subscripts 1 (the charge of the anion) and 2 (the charge of the cation) The formula is: MgF2 The sum of the charges equals zero: 1x(+2)+2x(-1)-0 You should be able to write formulas for the following: a. sodium iodide h. sodium oxide b. potassium bromide i. lithium nitride o. beryllium iodide p. zinc bromide c. magnesium fluoride j. zinc sulfide q. calcium fluoride d. calcium oxide k. aluminum nitride r. silver oxide e. barium sulfide 1. silver chloride m. potassium fluoride s. barium oxide f. calcium iodide n. aluminum sulfide t. sodium phosphide g. aluminum chloride

Chem Bonding Cheat Sheet

Related Documents

Recommended Documents

Description

Related Documents

Free up your schedule!

Take 5 seconds to unlock