Midterm1BFall07

Midterm1BFall07 - Midterm Exam 1 B 1. Which Exam are you...

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Midterm Exam 1 B 1. Which Exam are you taking? a) Midterm 1 A b) Midterm 1 B c) Midterm 1 C d) Midterm 1 D e) Midterm 1 E 2. Crystalline potassium hydrogen phthalate KHC 8 H 4 O 4 is used to standardize basic solutions. If 1.548 g of this salt is titrated with a solution of Ca(OH) 2 , the end point is reached when 42.37 mL of the solution has been added. What is the molarity of the Ca(OH) 2 solution? (Atomic weights: C = 12.01, O = 16.00, H = 1.008, Ca = 40.08, K = 39.10) 2 KHC 8 H 4 O 4 + Ca(OH) 2 Ca(KC 8 H 4 O 4 ) 2 + 2 H 2 O a) 4.457 x 10 -2 b) 6.225 x 10 -2 c) 8.915 x 10 -2 d) 1.243 x 10 -1 e) 8.954 x 10 -2 3. Determine the mass (g) of solute required to form 500.0 mL of a 0.480 M MgCl 2 . (Atomic weights: Mg = 24.30, Cl = 35.45) a) 19.8 b) 21.1 c) 22.8 d) 24.2 e) 26.3 1
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4. The equation for the reduction of iron ore in a blast furnace is given below. How many kilograms of iron can be produced by the reaction of 7.00 kg of Fe 2 O 3 and 3.00 kg of CO? (Atomic weights: Fe = 55.85, O = 16.00, C = 12.01) Fe 2 O 3 + 3 CO 2 Fe + 3 CO 2 a) 3.65 b) 3.98 c) 4.20 d) 4.32 e) 4.74 5. Balance the following equation. What is the sum of the coefficients of the reactants and products? __I 2 O 5 + __BrF 3 __ IF 5 + __O 2 + __ Br 2 a) 25 b) 32 c) 45 d) 56 e) 63 6. During naval battle in the South Pacific in WW2, the U.S. navy produced smokescreens by spraying titanium tetrachloride into the moist air to produce TiO 2 . How many grams of TiO 2
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This note was uploaded on 07/17/2008 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

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Midterm1BFall07 - Midterm Exam 1 B 1. Which Exam are you...

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