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Chem111 Exam 2: Inorganic Chemistry Questions, Exams of Chemistry

Questions from an inorganic chemistry exam, including identifying compounds using systematic names, calculating empirical formulas, and balancing net ionic equations. It also includes questions on thermochemistry and redox reactions.

Typology: Exams

2010/2011

Uploaded on 10/17/2011

kelseybradley1
kelseybradley1 🇺🇸

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CHEM111, EXAM 2, S07 B Name_________________________________________
You must show all work for credit
1. (8 points) Name the following compounds using the correct systematic method
(a) H2SO3
(b) N2O5
(c) PCl3
(d) HNO3
2. (10 points) Nicotine, contains 74.30% C, 8.70%, H and 17.27% N by mass. What is the empirical
formula of nicotine?
3. (8 points) 100.0 mL of an 18.0 M solution of H2SO4 is transferred to a volumetric flask and
diluted to 250.0 mL. What is the concentration of the new solution?
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  1. (8 points) Name the following compounds using the correct systematic method (a) H 2 SO 3

(b) N 2 O 5

(c) PCl (^3)

(d) HNO 3

  1. (10 points) Nicotine, contains 74.30% C, 8.70%, H and 17.27% N by mass. What is the empirical formula of nicotine?
  2. (8 points) 100.0 mL of an 18.0 M solution of H 2 SO 4 is transferred to a volumetric flask and diluted to 250.0 mL. What is the concentration of the new solution?

You must show all work for credit

  1. (12 points) The thermite reaction, used to weld rails together in the building of railroads is described by the following equation: Fe 2 O 3 (s) + 3 Al(s) → Al 2 O 3 (s) + 2 Fe(l) (a) How many grams of iron metal are produced if 150.0 g of aluminum metal is reacted with 250.0 g iron(III) oxide?

(b) What is the percent yield of the reaction in part a if 152.3 g of iron metal was produced by the reaction.

  1. (10 points) How many grams are needed to prepare 250.0 mL of a 0.200 M sucrose (C 12 H 22 O 11 ) solution?

You must show all work for credit

  1. (6 points) In the following reaction: CuCl 2 (aq) + Zn(s) → ZnCl 2 (s) +Cu(s)

(a) identify the species being oxidized

(b) identify the reducing agent

  1. (5 points) Given the following data: 2 H 2 O 2 (l) → O 2 (g) + H 2 O(l) ΔH = -196 kJ

Calculate ΔH for the following reaction: H 2 O(l) + ½ O 2 (g) → H 2 O 2 (l)

  1. (12 points) Top fuel dragsters and funny cars burn nitromethane as fuel according to the following combustion equation: 2 CH 3 NO 2 (l) + 3/2 O 2 (g) → 2 CO 2 (g) + 3 H 2 O(g) + N 2 (g) Calculate ΔHo^ for this reaction.

Substance (^) ΔH°f (kJ/mol) CH 3 NO 2 (l) -401. H 2 O(l) - H 2 O(g) - CO(g) -110. CO 2 (g) -393.

You must show all work for credit