MIDTERM+3+Form+A+Key - 3.39 mL b) 10.2 mL c) 21.2 mL d)...

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Midterm 3 Exam, Form A, CHEM 001 Fall, 2010. (Chapters 13, 14, 15 and 16) Name: ______________________ Date: ____________ Please be sure that any chemical equation given in the question(s) below is balanced before you attempt to answer the respective question(s). 1. The major component of a solution is … a) the solute b) the solvent 2. What is the mass percent of NaNO 3 of a solution in which 59.95 g of NaNO 3 was dissolved in 250. mL of water? Assume the density of water is 1.00 g/mL. a) 80.7 % b) 75.3 % c) 19.3 % d) 25.5 % 3. What mass of solute is required to prepare a 13.8 % by mass NaOH solution if the solution’s mass is 58.0 g? a) 8.00 g b) 86.2 g c) 16.0 g d) 6.25 g 4. How many grams of NaOH will be required to completely react with 500. mL of 1.00 M H 2 SO 4 ? H 2 SO 4 + NaOH Na 2 SO 4 + H 2 O a) 98.08 g b) 20.2 g c) 26.3 g d) 40.0 g 5. How many milliliters of a concentrated 2.50 M HCl solution will be required to prepared 255 mL of a 0.100 M HCl solution? a)
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Unformatted text preview: 3.39 mL b) 10.2 mL c) 21.2 mL d) 40.0 mL 6. What is the pH of a 0.250 M HCl solution? a) 0.60 b) 13.4 c) 7.00 d) 0.40 Page 1 of 2 Midterm 3 Exam, Form A, CHEM 001 Fall, 2010. (Chapters 13, 14, 15 and 16) 7. What is the net ionic equation for … Na 2 SO 4 (aq) + Ba(NO 3 ) 2 (aq) → BaSO 4 (s) + NaNO 3 (aq) a) Na + (aq) + NO 3-(aq) → NaNO 3 (s) b) H + (aq) + OH- (aq) → H 2 O (l) c) Ba +2 (aq) + SO 4-2 (aq) → BaSO 4 (s) d) BaNO 3 (aq) → Ba +2 (aq) + NO 3-(aq) 8. What does not appear in an equilibrium expression, K eq ? a) gases b) pure liquids c) strong electrolytes 9. A 0.250 M solution of a weak acid, HA, has an equilibrium pH of 3.25. The ionization constant, K a , for the acid is… HA (aq) → H + (aq) + A-(aq) a) 1.27 x 10-6 b) 7.2 x 10 –3 c) 2.4 x 10 –4 d) 1.63 x 10 –4 10. What is the pH of a 0.200 M NaOH solution? a) 0.70 b) 13.30 c) 3.72 d) 4.89 Page 2 of 2...
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This note was uploaded on 06/30/2011 for the course CHEM 1A taught by Professor Kim during the Spring '11 term at San Joaquin Delta College.

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MIDTERM+3+Form+A+Key - 3.39 mL b) 10.2 mL c) 21.2 mL d)...

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