119. Calculate the oxidation number of the chlorine in perchloric acid, HCIO4, a strong oxidizing agent. A) -1 B) +4 C) +5 +7 None of the above is the correct oxidation number. E) 120. Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S20s A) -2 B) +2 C) +4 D) +5 E) None of the above is the correct oxidation number. 121. Sodium tripolyphosphate is used in detergents to make them effective in hard wet Calculate the oxidation number of phosphorus in NasP3O10. A) +3 B) +5 C) +10 D) +15 E) None of the above is the correct oxidation number. 122. What is the oxidation number of iodine in I2. A) -1 B) 0 C) +1 D) +7 E) None of the above is the correct oxidation number. 123. The oxidation numbers of P, S, and Cl in H2PO2 , H2S, and KCIO4 are, respectively A) -1,-1, +3. B) +1,-2, +7. C) +1, +2, +7. D) -1,-2, +7. E) -1,-2, +3. 91. How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is E) 0.090 mol D) 0.18 mol dissolved in water? C) 0.27 mol B) 0.54 mol A) 0.81 mol 92. How many moles of ions are released when 1.6 mol of ammonium phosphate (NH4)3PO4, is dissolved in water? A) 0.40 mol E) 6.4 mol D) 4.8 mol C) 3.2 mol B) 1.6 mol 93. Select the precipitate that forms when the following reactants are mixed. NazCOs(aq) A) ВаСОз BaCh(aq) B) ВаСОз -> E) BaO D) NaCl2 C) NaCl 94. Select the precipitate that forms when the following reactants are mixed. Mg(CH:COO)2(aq) A) LICH3CO0 CH3OH + LIOH(aq) B) Li(CH3COO)2 D) Mg(OH)2 E) C) MgOH 95. Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate. A) CuS D) NH4(NO3)2 E) CUSO4 B) CuzS C) NH4NO3 96. Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate. D) Pb2SO4 E) PbS C) PBSO4 B) NazNO3 A) NaNO3 97. Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) A) copper(I) carbonate, CU2CO3 B) copper(II) carbonate, Cu2CO3 C) copper(I) carbonate, CuCO3 Na2CO3(aq) -> D) copper(II) carbonate, CUCO3 E) sodium chloride, NaCl 98. Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. COSO4(aq) A) cobalt(II) phosphate, Co3(PO4)2 B) cobalt(III) phosphate, Co3(PO4)2 C) cobalt(II) phosphate, COPO4 (NH4);PO4(aq) -> D) cobalt(III) phosphate, COPO4 E) ammonium sulfate, (NH4)2S04 49