Discovery 5
pH= 8.389
A buffer is prepared containing 0.700 molar nicotine and 0.300 molar nicotine hydrochloride. What is the pH? The Kb for nicotine is 1.05 x 10^-6. Please remember that Kw= KaKb where Kw= 1 x 10^-14)
pH= 9.151
A buffer is prepared containing 0.800 molar ammonia and 1.00 molar ammonium chloride. What is its pH? (pKa = 9.248)
pH= 9.151
A buffer is prepared containing 0.800 molar ammonia and 1.00 molar ammonium chloride. What is the pH (pKa = 9.248)?
a) 10000= [A-]/[HA] b) 0.01= [A-]/[HA]
Aspirin has a pKa of 3.4. What is the ratio of [A-] to [HA] in: (a) the blood (pH= 7.4) (B) the stomach (pH= 1.4)
pH = 5.5
Calculate the pH of a buffer composed of 0.1M acetic acid (CH3COOH) and 0.6M acetate (CH3COO-) knowing that the acid dissociation constant Ka is 1.8x 10-5.
[A-] = 1.58mM of sodium acetate needs to be added
You need to produce a buffer solution that has a pH of 4.25. You already have a solution that contains 5.0mM of acetic acid. What is the concentration of sodium acetate you will need to add to make the pH 4.25? The pKa of acetic acid is 4.75
33.113 mmol
You need to produce a buffer solution that has a pH of 5.27. You already have a solution that contains 10.0mmol of acetic acid. How many millimoles of sodium acetate will you need to add to this solution? The pKa of acetic acid is 4.75
