1e03-tut9-a2

1e03-tut9-a2 - CHEM 1E03 TUTORIAL # 9 Solutions _ 1. Are...

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CHEM 1E03 TUTORIAL # 9 Solutions ______________________________________________________________________________ 1. Are solutions of the following salts acidic, basic or neutral? Write balanced chemical equations for the reactions causing the solution to be acidic or basic, as appropriate. (a) KBr (b) NaCN (c) (C 5 H 5 NH)ClO 4 KBr from strong acid (HBr) and strong base (KOH) neutral salt NaCN from strong base (NaOH) and weak acid (HCN) basic salt CN + H 2 O HCN + OH (C 5 H 5 NH)ClO 4 from strong acid (HClO 4 ) and weak base (C 5 H 5 N) acidic salt C 5 H 5 NH + + H 2 O C 5 H 5 N + H 3 O + 2. You have 0.10 M aqueous solutions of HClO 3 , NaClO 3 , HClO 2 and NaClO 2 . Which answer below correctly lists these solutions in order of increasing pH (from lowest pH to highest pH)? (A) HClO 3 < NaClO 3 < HClO 2 < NaClO 2 (B) HClO 2 < HClO 3 < NaClO 3 < NaClO 2 (C) HClO 3 < HClO 2 < NaClO 2 < NaClO 3 (D) HClO 2 < HClO 3 < NaClO 2 < NaClO 3 (E) HClO 3 < HClO 2 < NaClO 3 < NaClO 2 HClO 3 (aq) and HClO 2 (aq) are weakly acidic, NaClO 3 (aq) and NaClO 2 (aq) are weakly basic. From their Lewis structures, HClO
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1e03-tut9-a2 - CHEM 1E03 TUTORIAL # 9 Solutions _ 1. Are...

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