Writing Chemical Formulas Practice Test

Chapter 9 Practice Test - Naming and Writing Chemical Formulas Matching Match each itme with the correct statement below. Match each item with the correct statement below. a. monatomic ion f. b. acid g. c. base h. d. law of definite proportions i. e. law of multiple proportions cation binary compound anion polyatomic ion ____ 1. consists of a single atom with a positive or negative charge ____ 2. atom or group of atoms having a negative charge ____ 3. atom or group of atoms having a positive charge ____ 4. tightly-bound group of atoms that behaves as a unit and carries a net charge ____ 5. compound composed of two different elements ____ 6. produces a hydrogen ion when dissolved in water ____ 7. produces a hydroxide ion when dissolved in water ____ 8. In any chemical compound, the masses of elements are always in the same proportion by mass. ____ 9. when two elements form more than one compound, the masses of one element that combine with the same mass of the other element are in the ratio of small, whole numbers Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 10. When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a ____. a. prefix c. Roman numeral following the name b. suffix d. superscript after the name ____ 11. Which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion? a. fluorine, F , fluoride ion c. copper, Cu , cuprous ion b. zinc, Zn , zincate ion d. sulfur, S , sulfurous ion ____ 12. The nonmetals in Groups 6A and 7A ____. a. lose electrons when they form ions b. have a numerical charge that is found by subtracting 8 from the group number c. all have ions with a –1 charge d. end in -ate ____ 13. Which of the following is NOT a cation? a. iron(III) ion b. sulfate c. Ca d. mercurous ion ____ 14. An -ate or -ite at the end of a compound name usually indicates that the compound contains ____. a. fewer electrons than protons c. only two elements b. neutral molecules d. a polyatomic anion ____ 15. Which of the following is true about the composition of ionic compounds? a. They are composed of anions and cations. b. They are composed of anions only. c. They are composed of cations only. d. They are formed from two or more nonmetallic elements. ____ 16. Which element, when combined with fluorine, would most likely form an ionic compound? a. lithium c. phosphorus b. carbon d. chlorine ____ 17. Which of the following compounds contains the lead(II) ion? a. PbO c. Pb2O b. PbCl4 d. Pb2S ____ 18. What is the correct formula for potassium sulfite? a. KHSO c. K SO b. KHSO d. K SO ____ 19. What type of compound is CuSO ? a. monotomic ionic b. polyatomic covalent c. polyatomic ionic d. binary molecular ____ 20. Sulfur hexafluoride is an example of a ____. a. monatomic ion b. polyatomic ion c. binary compound d. polyatomic compound ____ 21. Molecular compounds are usually ____. a. composed of two or more transition elements b. composed of positive and negative ions c. composed of two or more nonmetallic elements d. exceptions to the law of definite proportions ____ 22. In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by ____. a. Roman numerals c. prefixes b. superscripts d. suffixes ____ 23. Consider a mystery compound having the formula M T . If the compound is not an acid, if it contains only two elements, and if M is not a metal, which of the following is true about the compound? a. It contains a polyatomic ion. c. Its name ends in -ic. b. Its name ends in -ite or -ate. d. It is a binary molecular compound. ____ 24. When dissolved in water, acids produce ____. a. negative ions c. hydrogen ions b. polyatomic ions d. oxide ions ____ 25. When naming acids, the prefix hydro- is used when the name of the acid anion ends in ____. a. -ide c. -ate b. -ite ____ 26. What is the name of H SO ? a. hyposulfuric acid b. hydrosulfuric acid d. -ic c. sulfuric acid d. sulfurous acid ____ 27. When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ____. a. -ous c. -ate b. -ic d. -ite ____ 28. What is the formula for hydrosulfuric acid? a. H S b. H SO c. HSO d. H S ____ 29. What is the correct name for the compound CoCl ? a. cobalt(I) chlorate c. cobalt(II) chlorate b. cobalt(I) chloride d. cobalt(II) chloride ____ 30. What is the correct formula for barium chlorate? a. Ba(ClO) c. Ba(ClO ) b. Ba(ClO ) d. BaCl ____ 31. What is the correct formula for calcium dihydrogen phosphate? a. CaH PO c. Ca(H PO ) b. Ca H PO d. Ca(H HPO ) ____ 32. What does an -ite or -ate ending in a polyatomic ion mean? a. Oxygen is in the formula. c. Nitrogen is in the formula. b. Sulfur is in the formula. d. Bromine is in the formula. ____ 33. What is the correct name for Sn (PO ) ? a. tritin diphosphate b. tin(II) phosphate c. tin(III) phosphate d. tin(IV) phosphate Essay 34. Name the compounds CuBr , SCl , and BaF . Explain the use or omission of the Roman numeral (II) and the prefix di-. Chapter 9 Practice Test - Naming and Writing Chemical Formulas Answer Section MULTIPLE CHOICE MATCHING 1. ANS: A 10. ANS: C 22. ANS: C 11. ANS: C 23. ANS: D 2. ANS: H 12. ANS: B 3. ANS: F 13. ANS: B 24. ANS: C 25. ANS: A 4. ANS: I 14. ANS: D 5. ANS: G 15. ANS: A 27. ANS: A 16. ANS: A 28. ANS: D 6. ANS: B 26. ANS: D 17. ANS: A 29. ANS: D 7. ANS: C 8. ANS: D 18. ANS: C 9. ANS: E 19. ANS: C 30. ANS: C 31. ANS: C 20. ANS: C 32. ANS: A 21. ANS: C 33. ANS: B ESSAY 34. ANS: CuBr is copper(II) bromide. The name must include a Roman numeral because copper is a transition element that can form ions with more than one charge. SCl 2 is sulfur dichloride. The compound is named with prefixes because sulfur and chlorine are both nonmetals and thus form a molecular compound. BaF is barium fluoride. A Roman numeral is not needed in this name because barium is a Group A metal and forms only the 2+ ion. Prefixes are not used in ionic compounds.