Calculate the pH of a mixture of 0.12 M acetic acid and 0.25 M sodium acetate. The pKa of acetic acid is 4.76.

An analytical chemist is titrating 116.4 mL of a 0.7000M solution of cyanic acid (HCNO) with a 0.7700M solution of NaOH. The pK of cyanic acid is 3.46. Calculate the pH of the acid solution after the chemist has added 59.37 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places. pH =

An analytical chemist is titrating 198.6 mL of a 0.7200M solution of formic acid (H₂CO₂) with a 0.7700M solution of KOH. The p K of formic acid is 3.74. Calculate the pH of the acid solution after the chemist has added 209.6 mL of the KOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of KOH solution added. Round your answer to 2 decimal places.

An analytical chemist is titrating  129.9mL  of a  0.5200M  solution of hydrazoic acid  HN3  with a  0.2100M  solution of  NaOH . The  pKa  of hydrazoic acid is  4.72 . Calculate the pH of the acid solution after the chemist has added  241.9mL  of the  NaOH  solution to it.   Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of  NaOH  solution added.   Round your answer to  2  decimal places.

An analytical chemist is titrating  145.6mL  of a  1.100M  solution of hydrazoic acid  HN3  with a  0.8100M  solution of  KOH . The  pKa  of hydrazoic acid is  4.72 . Calculate the pH of the acid solution after the chemist has added  236.7mL  of the  KOH  solution to it.   Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of  KOH  solution added.   Round your answer to  2  decimal places.

An analytical chemist is titrating 157.6 mL of a 1.000 M solution of cyanic acid (HCNO) with a 1.100 M solution of NaOH. The pka of cyanic acid is 3.46. Calculate the pH of the acid solution after the chemist has added 23.64 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places.

The pH of 0.200 M NaA (the sodium salt of a weak acid HA) is 8.24. Calculate the pKa of the weak acid HA.

Calculate the pH of a solution formed by adding 8.00 grams of solid sodium azide, NaN₃, to 210.0 ml of 0.230 M hydrazoic acid solution, HN₃. You may assume that the salt dissolves completely and that the change in volume is negligible upon addition of the solid.

Calculate the ratio of conjugate base to weak acid needed to make a buffer at pH 4.75 if the pKa of the acid is 5.32.

An analytical chemist is titrating 246.3 mL of a 0.8100M solution of butanoic acid (HC3H₂CO₂) with a 0.5500M solution of NaOH. The p K of butanoic acid a is 4.82. Calculate the pH of the acid solution after the chemist has added 429.8 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places.