CH 101s - HW 12

# Select the stronger acid in each pair a or b note

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No marks will be shown for this question. Select the stronger acid in each pair (A or B). Note that CH 3 and CH 2 groups are electron donating groups, i.e., they place electron density on the atoms to which they are attached. A B Stronger acid HClO 2 HClO A H 2 O H 2 S B HOH CH 3 OH A Given the following K a 's: K a (HF) = 7.2x10 -4 K a (HC 2 H 3 O 2 ) = 1.8x10 -5 K a (HClO) = 3.5x10 -8 K a (HCN) = 4.0x10 -10

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12/17/09 9:34 PM CH 101s - HW 12 Page 3 of 6 4. 4/4 points 1/5 submissions Notes 5. 35/35 points 1/5 submissions Notes determine the equilibrium constant for each reaction. Express the equilibrium constants to only two significant figures. Also indicate whether a single or double arrow would be more appropriate. No marks will be shown for your arrow responses. Reaction K Arrows HC 2 H 3 O 2 + F 1- C 2 H 3 O 2 1- + HF 0.025 0.025 double arrows HClO + F 1- ClO 1- + HF 87 4.9e-05 double arrows HC 2 H 3 O 2 + ClO 1- C 2 H 3 O 2 1- + HClO 0.011 510 double arrows HF + CN 1- F 1- + HCN 1.80e+06 1.80e+06 single arrow Calculate the pH of a strong acid solution of 0.080 M HCl . Express your answer to the nearest 0.1 pH unit. pH = 1.1 1.1 Use the Acid-Base Table or Table 12.3 on page 282 of your textbook to write net equations for the acid-base reactions that occur when aqueous solutions of the following are mixed. Indicate the extent
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