10462ndspring2011f3

10462ndspring2011f3 - GeneralChemistryI exam2 Form 3...

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General Chemistry I exam 2 10/20/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In which of the following reactions will K c = K p ? A) N 2 O 4 (g) 2NO 2 (g) B) N 2 (g) + 3 H 2 (g) 2 NH 3 (g) C) CH 4 (g) + H 2 O(g) CO(g) + 3 H 2 (g) D) H 2 (g) + I 2 (g) 2 HI(g) E) CO(g) + 2 H 2 (g) CH 3 OH(g) 1) 2) Which of the following is an Arrhenius acid? A) LiOH B) H 2 SO 4 C) CH 3 CH 3 D) NH 2 CH 3 E) More than one of these is an Arrhenius acid. 2) 3) Determine the pH of a 0.461 M C 6 H 5 CO 2 H M solution if the K a of C 6 H 5 CO 2 H is 6.5 x 10 - 5 . A) 9.48 B) 4.52 C) 11.74 D) 2.26 E) 5.48 3) 4) Determine the pH of a 0.22 M NaF solution at 25°C. The K a of HF is 3.5 × 10 - 5 . A) 8.90 B) 10.20 C) 2.56 D) 11.44 E) 5.10 4) 5) Which one of the following will form an acidic solution in water? A) LiI B) NH 4 Cl C) KNO 3 D) NaF E) None of the above solutions will be acidic. 5) 6) What is the conjugate acid of HCO 3 ? A) OH B) H 3 O + C) H 2 OD ) C O 3 2 - E) H 2 CO 3 6) 7) Calculate the pH of a solution that contains 2.4 × 10 - 5 M H 3 O at 25°C. A) 11.60 B) 9.38 C) 4.62 D) 4.17 E) 2.40 7) 8) Calculate the hydroxide ion concentration in an aqueous solution with a pH of 4.33 at 25°C. A) 2.1 × 10 - 10 M B) 3.8 × 10 - 5 M C) 4.7 × 10 - 5 M D) 9.7 × 10 - 10 M E) 6.3 × 10 - 6 M 8) C 1
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9) Determine the [OH ] concentration in a 0.169 M Ca(OH) 2 solution. A) 0.169 M B) 5.92 × 10 - 14 M C) 2.96 × 10 - 14 M D) 0.298 M E) 0.338 M 9) 10) Which of the following acids is the STRONGEST? The acid is followed by its K a value. A) HClO 2 , 1.1 × 10 - 2 B) HCHO 2 , 1.8 × 10 - 4 C) HF, 3.5 × 10 - 4 D) HNO 2 , 4.6 × 10 - 4 E) HCN, 4.9 × 10 - 10 10) 11) How many of the following are acisds are WEAK acids? HCN HClO 2 HNO 3 H 2 PO 4 A) 3 B) 4 C) 1 D) 2 E) 0 11) 12) The reaction below has a K p value of 3.3 x 10 - 5 . What is the value of K c for this reaction at 700 K?
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This note was uploaded on 12/17/2011 for the course CHM 1046 taught by Professor Staff during the Fall '08 term at FIU.

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10462ndspring2011f3 - GeneralChemistryI exam2 Form 3...

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