1. Calculate the buffer capacity for 100 mL of buffer if 12.02 mL of 0.09978 M...

1. Calculate the buffer capacity for 100 mL of buffer if 12.02 mL of 0.09978 M NaOH was used to change the pH by 0.54 units.

a. 0.022 b. 0.00022 c.12.22 d.0.22

2. Calculate the pH of a buffer with 0.10 M benzoic acid and 0.10 M sodium benzoate. Use activity coefficient table 8-1 in the (9th edition) textbook to determine the activities for the ions (benzoate ion =C₆H₅CO₂¯). The pKa of benzoic acid is 4.20.

a. 4.20 b. 4.28 c.4.10 d.4.35

3. Suppose you have a solution of benzoic acid and sodium benzoate with an ionic strength of 0.19 M. Calculate the activity coefficient for the benzoate ion. The benzoate ion has an ion size of 600 pm.

a.-0.46 b.0.83 c.3.26 d. 0.34 e.0.75

Expert Solution

queen_honey_blossom answered 2 years ago

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1. Calculate the buffer capacity for 100 mL of buffer if 12.02 mL of 0.09978 M...

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