chm 2045 quiz 2 - CHM 2045 Quiz #2 09/25/2007 Name:...

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CHM 2045 Quiz #2 09/25/2007 Name: Section: Question # 1 Here is the reaction of calcium carbonate and hydrochloric acid: CaCO 3 (s) + 2HCl(aq) CO 2 (g) + CaCl 2 (aq) + H 2 O(l) (a) What type of reaction is this? (1 point) (b) What mass of CaCO 3 will completely react with 200mL of HCl(aq) with a pH of 1.30? (3 points) Gas-forming reaction Mass of CaCO 3 = 0.200 L • 10 -1.30 • 0.5 • 100.08 g/mol = 0.50 g Question # 2 Please write down the (1) reducing agent; (2) oxidizing agent; (3) net ionic equation of the following overall equations (6 points) (a) Cu (s) + 4HNO 3 (aq) Cu(NO 3 ) 2 (aq) + 2NO 2 (g) + 2H 2 O (l) Reducing agent: Cu (s); Oxidizing agent: HNO 3 (aq) Net ionic equation: Cu (s) + 2NO 3 2- (aq) + 4H + (aq) Cu 2+ (aq) + 2NO 2 (g) + 2H 2 O (l) (b) 2NaI (aq) + 2H 2 SO 4 (aq) + MnO 2 (s) Na 2 SO 4 (aq) + MnSO 4 (aq) + I 2 (g) + 2H 2 O (l) Reducing agent: NaI (aq); Oxidizing agent: MnO 2 (s) Net ionic equation: I - (aq) + 4H + (aq) + MnO 2 (s) Mn 2+ (aq) + I 2 (g) + 2H 2 O (l)
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This note was uploaded on 04/24/2008 for the course CHM 2045 taught by Professor Mitchell during the Fall '07 term at University of Florida.

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