Chemistry Honors – Chapter 9 Assignment 42. a. nonmetals -2 b. +1 c. –1 d. metals +3 43. a. Sr +2 b. Ca +2 c. Al +3 d. Cs +1 44. a. barium ion b. iodide c. silver ion d. mercury(II) ion 45. cyanide (CN –1) and hydroxide (OH –1) are two polyatomics that do not end in –ite or –ate. 46. a. hydroxide b. lead(IV) ion c. sulfate d. oxide 47. Every ionic compound has a net ionic charge of zero. The ions combine in a certain ratio, such that their individual charges cancel to zero. 49. A variable charge cation’s charge can be determined from a formula, by looking at the ratio of ions in that formula. For example, what is the charge of iron in Fe2O3? 51. a and b are binary ionic compounds. 52. Parentheses are used in a formula, when more than one polyatomic ion is needed. 53. -1 -2 -1 -3 NO3 CO3 CN PO4 +1 b. NH4 a. NH4NO3 c. NH4CN d. (NH4)3PO4 (NH4)2CO3 +4 Sn e. Sn(NO3)4 f. Sn(CO3)2 g. Sn(CN)4 h. Sn3(PO4)4 +3 Fe i. Fe(NO3)3 j. Fe2(CO3)3 k. Fe(CN)3 l. FePO4 +2 Mg m. Mg(NO3)2 n. MgCO3 o. Mg(CN)2 p. Mg3(PO4)2 Names of compounds: a. ammonium nitrate i. iron(III) nitrate b. ammonium carbonate j. iron(III) carbonate c. ammonium cyanide k. iron(III) cyanide d. ammonium phosphate l. iron(III) phosphate e. tin(IV) nitrate m. magnesium nitrate f. tin(IV) carbonate n. magnesium carbonate g. tin(IV) cyanide o. magnesium cyanide h. tin(IV) phosphate p. magnesium phosphate 54. A binary molecular compound contains two different nonmetal elements, or a metalloid with a nonmetal. 55. a. tri b. mono c. di d. hexa e. penta f. tetra 56. Formulas for binary molecular compounds are written, by using the prefixes attached to the element names. If the first element does not have a prefix, there is one atom of that element. When the formula is given, the name is written by using the prefixes, and the suffix –ide in the last element’s name. –Mono is not used for the first element. 57. a. BCl3 b. dinitrogen pentoxide c. N2H4 d. carbon tetrachloride 58. a. hydrochloric acid b. H2SO4 (aq) c. nitric acid d. HC2H3O2 (aq) 59. No – the compound is only an acid if it is dissolved in water (aq). 60. a. HNO2 (aq) b. Al(OH)3 c. H2Se (aq) d. Sr(OH)2 e. H3PO4 (aq) 61. a. Fe(OH)2 b. lead(II) hydroxide c. Cu(OH)2 d. cobalt(II) hydroxide 65. a. KMnO4 b. Ca(HCO3)2 c. Cl2O7 d. Si3N4 e. NaH2PO4 f. PBr5 g. CCl4 66. a. MgS b. Na3PO3 c. Ba(OH)2 d. Cu(NO2)2 e. K2SO3 f. CaCO3 g. NaBr h. Fe2(SO4)3 69. a. magnesium permanganate b. beryllium nitrate c. potassium carbonate d. dinitrogen tetrahydride e. lithium hydroxide f. barium fluoride (check your spelling of fluoride) g. phosphorus triiodide h. zinc oxide i. hydrogen phosphite (or phosphorous acid if (aq) were there) 71. A binary molecular compound. 79. Transition metal charges cannot be determined by placement on the PT. 81. a. N2O ; dinitrogen monoxide b. NO2 ; nitrogen dioxide c. NO ; nitrogen monoxide d. N2O4 ; dinitrogen tetraoxide .