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- 1. Open EndedWhat is the significance of a chemical formula?
- 2. Open EndedHow do molecular chemical formulas differ from ionic chemical formulas?
- 3. Open EndedWrite formulas for the compounds formed between the following: a. Aluminium and Bromine b. Sodium and Oxygen c. Magnesium and Iodine d. Pb2+ and O2- e. Sn2+ and I- f. Fe3+ and S2- g. Cu2+ and NO-₃ h. NH+₄ and SO2₄-
- 4. Open EndedName the following compounds by using the Stock system: a. NaI b. MgS c. CaO d. K₂S e. CuBr f. FeCl₂
- 5. Open EndedWrite a formula for the following compound: a. Sodium hydroxide b. Lead(II) nitrate c. Iron(II) sulfate d. Diphosphorus trioxide e. Carbon diselenide
- 6. Open EndedDraw the Lewis structure, give the name, and predict the VSEPR geometry of SCl₂
- 7. Open EndedWhat are monatomic ions?
- 8. Open EndedGive three examples of monatomic ions?
- 9. Open EndedHow does the chemical formula for the nitrite ion differ from the chemical formula for the the nitrate ion?
- 10. Open EndedUsing only the periodic table, write the symbol of the ion most typically formed by each of the following elements: a. K b. Ca c. S d. Cl e. Ba f. Br
- 11. Open EndedWrite the formula for and indicate the charge on each of the following ions: a. Sodium ion b. Aluminium ion c. Chloride ion d. Nitride ion e. Iron (II) ion f. Iron (III) ion
- 12. Open EndedName each of the following monatomic ions: a. K+ b. Mg2+ c. Al3+ d. Cl- e. O2- f. Ca2+
- 13. Open EndedWrite formulas for the binary ionic compounds formed between the following elements. a. sodium and iodine b. calcium and sulfur c. zinc and chlorine d. barium and fluorine e. lithium and oxygen
- 14. Open EndedGive the name of each of the following binary ionic compound: a. KCI b. CaBr₂ c. Li₂O d. MgCl₂
- 15. Open EndedWrite the correct formula and give the names of the compounds formed by the following ions: a. Cr2+ and F1- b. Ni2+ and O2- c. Fe3+ and O2-
- 16. Open EndedWhat determines the order in which the component elements of binary molecular compounds are written?
- 17. Open EndedWrite formulas for each of the following binary molecular compounds? a. Carbon tetrabromide b. Sulfur dioxide c. Phosphorus pentabromide d. Iodine trichloride e. Nitrogen triiodide f. Dinitrogen trioxide
- 18. Open EndedDistinguish between binary acids and oxyacids, and give two examples of each.
- 19. Open EndedWhat is a salt?
- 20. Open EndedGive two examples of salts.
- 21. Open EndedName each of the following acids: a. HF b. HBr c. HNO₃ d. H₂SO₄ e. H₃PO₄
- 22. Open EndedGive the molecular formulas for each of the following acids: a. Sulfurous acid b. Chloric acid c. Hydrochloric acid d. Hypochlorous acid e. Perchloric acid f. Carbonic acid g. Acetic acid
- 23. Open EndedAssign oxidation numbers to each atom in the following compounds or ions: a. HF b. CI₄ c. H₂O d. PI₃ e. CS₂ f. Na₂O₂ g. H₂CO₃ h. NO-₂ i. SO2-₄
- 24. Open EndedName the following binary molecular compound according to the stock system: a. CI₄ b. SO₃ c. As₂S₃ d. NCl₃
- 25. Open EndedDetermine the oxidation numbers for iron oxide, Fe₃O₄, (recall that oxidation numbers are integers).
- 26. Open EndedName each of the following ions according to the Stock system: a. Fe2+ b. Fe3+ c. Pb2+ d. Pb2+ e. Pb4+ f. Sn2+ g. Sn4+
- 27. Open EndedName the following binary molecular compounds by using the Stock system: a. Carbon tetrabromide b. Sulfur dioxide c. Phosphorus pentabromide d. Iodine trichloride e. Nitrogen triiodide f. Dinitrogen trioxide
- 28. Open EndedWrite formulas for each of the following compounds: a. Phosphorus (III) iodide b. Sulfur (II) chloride c. Carbon (IV) sulfide d. Nitrogen (V) oxide
- 29. Open EndedWhat are oxidation numbers?
- 30. Open EndedWhat useful functions do oxidation numbers serve?
- 31. Open EndedWhat are the rules of assigning oxidation numbers?
- 32. Open EndedWhat is the difference between molar mass and formula mass?
- 33. Open EndedHow are molar mass and molecular mass different?
- 34. Open EndedWhat is the significance of molar mass?
- 35. Open EndedDetermine both formula mass and molar mass of ammonium carbonate (NH₄)₂CO₃.
- 36. Open EndedHow many moles of atoms of each element are there in one mole of (NH₄)₂CO₃?
- 37. Open EndedWhat is the mass in grams of 3.25 mol Fe₂(SO₄)₃?
- 38. Open EndedWhat is meant by the Percentage composition of Compounds?
- 39. Open EndedHow many molecule of aspirin, C₉H₈O₄, are there in a 100.0 mg tablet of aspirin?
- 40. Open EndedCalculate the percentage composition of (NH₄)₂CO₃.
- 41. Open EndedA sample of hydrated copper (II) sulfate (CuSO₄ x ___H₂O) is heated to 150 degree C and produces 103.74g anhydrous copper (II) sulfate and 58.55g water. How many moles of water molecules are present in 1.0 mol of hydrated copper(II) sulfate?
- 42. Open EndedIn what unit is formula mass expressed?
- 43. Open EndedDetermine the formula mass of each of the following compounds or ions: a. Glucose, C₆H₁₂O₆ b. Calcium acetate, Ca(CH₃COO)₂ c. Ammonium ion, NH+₄ d. Chlorate ion, ClO-₃
- 44. Open EndedDetermine the number of moles of each type of monatomic or polyatomic ion in one mole of the following compounds. For each polyatomic ion, determine the number of moles of each atom present in one mole of the ion. a. KNO₃ b. Na₂SO₄ c. Ca(OH)₂ d. (NH₄)₂SO₄
- 45. Open EndedSee more practice problems on page 253 #30-33
- 46. Open EndedWhat three types of information are used to find empirical formula from percentage composition data?
- 47. Open EndedWhat are the steps to finding the empirical formula of a compound when you are given percent composition?
- 48. Open EndedA compound contains 36.48% Na, 25.41% S and 38.11% O. What is this compound's empirical formula?
- 49. Open EndedWhat are the steps to finding the empirical formula of a compound when you are given the sample mass and the mass of one of two elements within the compound?
- 50. Open EndedFind the empirical formula of a compound with a sample mass of 10.150 g, which is known to contain only phosphorus and oxygen and has a phosphorus content of 4.433 g.
- 51. Open EndedHow does a empirical formula differ from a molecular formula?
- 52. Open EndedWhat equation represents the relationship between the empirical formula and the molecular formula of a compound?
- 53. Open EndedWhat equation represents the relationship between empirical formula mass and molecular formula mass?
- 54. Open EndedHow do you find the molecular formula from the empirical formula of a compound?
- 55. Open EndedWhat is the molecular formula of a compound of phosphorus and oxygen whose empirical formula is P₂O₅ with a molar mass of 283.89 g/mol?
- 56. Open EndedSee page 253 for more practice problems (#36-39)
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