Ex2KeySu05 - CHM 3610 NAME(PRINTED) PROGRESS EXAM #2 KEY...

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CHM 3610 PROGRESS EXAM #2 June 3, 2005 NAME(PRINTED) KEY Score _________ Questions 1-25 are 6 points each for a total of 150 points. 1. Which of the following compounds is important in the body? (1) N 2 O (2) NO (3) N 2 O 3 (4) NO 2 (5) N 2 O 4 (6) none of the oxides 2. Circle the compounds is involved in air pollution. (1) N 2 O (2) NO (3) N 2 O 3 (4) NO 2 (5) N 2 O 4 (6) none of the oxides 3. Which is the correct order for the anions SO 4 2 , SO 3 2 , and SeO 4 2 in terms of increasing basicity from the weakest to the strongest ? (1) SO 4 2 < SO 3 2 < SeO 4 2 (2) SO 3 2 < SeO 4 2 < SO 4 2 (3) SeO 4 2 < SO 4 2 < SO 3 2 (4) SO 4 2 < SeO 4 2 < SO 3 2 (5) SO 3 2 < SO 4 2 < SeO 4 2 (6) SeO 4 2 < SO 3 2 < SO 4 2 The following cations and anions with their associated strengths will be used in questions 5 and 6 below. K + , non-acidic; Mg 2+ , moderately acidic; Th 4+ , strongly acidic; ClO 4 , non-basic; AsO 4 3 , moderately basic; SiO 4 4 , very strongly basic. 4. Give the correct formula for one and only one salt from the above choices that is expected to be soluble in water. K 3 AsO 4 K 4 SiO 4 Mg(ClO 4 ) 2 Th(ClO 4 ) 4 5. Give the correct formula for one and only one K + salt from the above choices that is expected to be not very soluble in water.
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Ex2KeySu05 - CHM 3610 NAME(PRINTED) PROGRESS EXAM #2 KEY...

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