1. A weak acid HA, has a pK of 5.0. If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of a water, what would the final pH be?

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1. A weak acid HA, has a pK of 5.0. If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of
a
water, what would the final pH be?
2. Making a buffer solution. Suppose you add 100 mL of a solution containing 5M of acetic acid to 400 mL of
0.5 M NaOH. Write the acid base reaction that is taking place and use an ICE table to show how the number of
moles of each species changes. What is the final pH of the buffer solution? (The pK of acetic acid is 4.7.)
3. a) A weak acid has a pKa of 5.5. A buffer (1L) is prepared by adding NaOH to a 1M solution of the weak
acid until the pH=6.0. Calculate the number of moles of HA and A- in the buffer solution.
b) 150 ml of 1.0 M HCl is added to the buffer in part a. What reaction is taking place and what will the resulting
pH be?
Transcribed Image Text:1. A weak acid HA, has a pK of 5.0. If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of a water, what would the final pH be? 2. Making a buffer solution. Suppose you add 100 mL of a solution containing 5M of acetic acid to 400 mL of 0.5 M NaOH. Write the acid base reaction that is taking place and use an ICE table to show how the number of moles of each species changes. What is the final pH of the buffer solution? (The pK of acetic acid is 4.7.) 3. a) A weak acid has a pKa of 5.5. A buffer (1L) is prepared by adding NaOH to a 1M solution of the weak acid until the pH=6.0. Calculate the number of moles of HA and A- in the buffer solution. b) 150 ml of 1.0 M HCl is added to the buffer in part a. What reaction is taking place and what will the resulting pH be?
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