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Chapter Four Extra Practice Solutions

# Chapter Four Extra Practice Solutions - Chapter Four Extra...

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1 Chapter Four Extra Practice Problems 1. Determine the oxidation state of sulfur in each of the following compounds: a) H 2 S -2 b) S 8 ( s ) 0 c) SCl 2 -2 d) Na 2 SO 3 +4 e) SO 4 2- +6 2. What is the oxidation state of the underlined element in each of the following? a) P 2 O 5 +5 b) Cr 2 O 7 2- +6 c) Sn Br 4 +4 d) KClO 4 +7 e) P 4 ( s ) 0 3. Determine the oxidation state of each element in each of the following compounds: a) As 2 O 3 O = -2, As = +3 b) NaHCO 3 Na = +1, H = +1, = -2, C = +4 c) Na 3 PO 4 Na = +1, O = -2, P = +5 d) NO + N = +3, O = -2 e) BrF 3 F = -1, Br = +3 f) PbSO 4 O = -2, Pb = +2. S = +6 g) SF 4 F = -1, S = +4 h) CoCl 4 2- Cl = -1, Co = +2 i) NO 2 - O = -2, N = +3 j) UO 2 2+ O = -2, U = +6

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2 4. Write the formula of each anion: a) sulfide S 2- b) sulfite SO 3 2- c) sulfate SO 4 2- d) hydrogen sulfate HSO 4 2- 5. Write balanced formula unit, total ionic, and net ionic equations for the reactions (if any) that occur when solutions of the following compounds are mixed: a) BaCl 2 and Na 2 SO 4 BaCl 2 (aq) + Na 2 SO 4 (aq) 2NaCl(aq) + BaSO 2 (s) Ba 2+ (aq) + Cl - (aq) + 2Na + (aq) + SO 4 2- (aq) 2Na + (aq) + 2Cl - (aq) + BaSO 2 (s) Ba 2+ (aq)) + SO 4 2- (aq) BaSO 2 (s) b) KCl and Na 2 SO 4 KCl(aq) + Na 2 SO 4 (aq) no reaction (both possible products are soluble, so there is no driving force for the reaction) c) Potassium hydroxide and cobalt(II) nitrate 2KOH(aq) + Co(NO 3 ) 2
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Chapter Four Extra Practice Solutions - Chapter Four Extra...

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