125 mL of 0.04 M acid, pKa 5.8, is mixed with 150 mL of a 0.4 M solution of its sodium salt. What is the pH of the final mixture?
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Question 2 Boric acid has a Ka of 5.8 × 10-10. What is the pKa? Assume boric acid is H3BO3 and is monoprotic. Question 3 A 0.25 M solution of boric acid is mixed with a 0.75 M solution of NaOH. What is the pH of the solution if 7.5 mL of boric acid is mixed with 5 mL of NaOH? Question 4 What volume of boric acid solution (in mL) is required to fully neutralize the sodium hydroxide solution?
1. What is the pH of a buffer solution prepared with a 0.4 M sodium citrate and 1% citric acid (pka for citric acid - 3.13, MW - 192 g/mol)? 8. A buffer solution is prepared using 0.4 mole of a weakly basic drug (pka - 10.1) and an unknown quantity of its salt. The final solution has a pH of 8.99. How much of the salt was used? 9. A buffer solution with a desired pH of 8.15 needs...
You need to prepare 100.0 mL of a pH=4.00 buffer solution using
0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate. How
much of each solution should be mixed to prepare this buffer?
You need to prepare 100.0 mL of a pH-4.00 buffer solution using 0.100 M benzoic acid (pKa 4.20) and 0.240 M sodium benzoate. How much of each solution should be mixed to prepare this buffer? Number 31 mL benzoic acid Number 31 mL sodium...
Question 6 100 mL of 0.25 M NaNO3 solution is mixed with 150 mL of 0.5 M NaNO3 solution. What is the molarity of the resulting mixture? 0.2 M 0.4 M 0.1 M 8.5 M
The pKa is 7.54.
Acid is HClO.
Part B If you have 500 mL of a 0.10 M solution of the acid, what mass of the corresponding sodium salt of the conjugate base do you need to make the buffer with a pH of 7.68 (assuming no change in volume)? Express the mass to two significant figures and include the appropriate units. TI MÅ ? 0 2 Units m= | Value m =
46. The pka for acetic acid is 4.76. What is the pH of a 0.04 M solution? (1) (3) 3.03 12.1 5.88 1.40 3.08 (5)
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Ibuprofen, a non-steroidal anti- inflammatory drug, is a weak acid with pKa of 5.2. The structure of ibuprofen is shown below. 2. bosiccare. Compare tor ibuprofen ablets 200 mg Reducer NAD) 500 COATED TABLETS a. What is the pH when 150 mL of 0.4 M NaOH is added to 150 mL of 1.5 M ibuprofen solution? b. What is the pH when 150 mL of 1.5M ibuprofen solution is added to 5L of water?
If you mixed 50 mL of 0.1 M TRIS acid with 60 mL of 0.2 M TRIS base, the resulting pH is 8.67. How many total mL of 1 M NaOH could you add to the solution and still have a good buffer (i.e. within one pH unit of the pKa which equals 8.3)?
Calculate the pH when 57.0 mL of 0.237 M perchloric acid is mixed with 57.0 mL of 0.237 M sodium hydroxide solution at 25 °C. Calculate the pH when 57.0 mL of 0.237 M of a certain monoprotic weak acid, HA, is mixed with 57.0 mL of 0.237 M sodium hydroxide solution at 25 °C. For HA, the Ka is 8.1× 10–5.
A buffer solution is made by adding 75.52 mL of 1.00 M phosphoric acid (H3PO4, pKa = 2.12) with 10.00 mL of 1.00 M sodium dihydrogen phosphate (NaH2PO4, pKa = 7.21). What is the pH of the buffer solution?