A solution contains 0.323 M potassium fluoride and 0.416 M hydrofluoric acid. The pH of this solution is .
A solution contains 0.323 M potassium fluoride and 0.416 M hydrofluoric acid. The pH of this...
A solution contains 0.231 M potassium fluoride and 0.120 M hydrofluoric acid. The pH of this solution is .
A 1 liter solution contains 0.416 M hydrofluoric acid and 0.312 M sodium fluoride. Addition of 0.156 moles of hydrobromic acid will: (Assume that the volume does not change upon the addition of hydrobromic acid.) Raise the pH slightly Lower the pH slightly Raise the pH by several units Lower the pH by several units Not change the pH Exceed the buffer capacity
1. A buffer solution contains 0.256 M hydrofluoric acid and 0.308 M potassium fluoride. If 0.0414 moles of hydrochloric acid are added to 225 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume does not change upon adding hydrochloric acid) pH = 2. A buffer solution contains 0.328 M ammonium chloride and 0.331 M ammonia. If 0.0396 moles of sodium hydroxide are added to 225 mL of this buffer, what is the...
A 1 liter solution contains 0.428 M hydrofluoric acid and 0.571 M potassium fluoride. Addition of 0.107 moles of barium hydroxide will: (Assume that the volume does not change upon the addition of barium hydroxide.) choose all that apply. - Raise the pH slightly - Lower the pH slightly - Raise the pH by several units - Lower the pH by several units - Not change the pH - Exceed the buffer capacity
A buffer solution contains 0.392 M hydrofluoric acid and 0.357 M potassium fluoride . If 0.0229 moles of sodium hydroxide are added to 125 mL of this buffer, what is the pH of the resulting solution? (Assume that the volume does not change upon adding sodium hydroxide.) pH =
1) A buffer solution contains 0.346 M hydrofluoric acid and 0.392 M sodium fluoride . If 0.0239 moles of potassium hydroxide are added to 125 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume does not change upon adding potassium hydroxide. ) pH = _______ 2) A student needs to prepare a buffer made from HF and KF with pH 2.904. If Ka for HF is 7.2x10^-4, what ratio of [HF]/[F-] is...
A 1 liter solution contains 0.284 M hydrofluoric acid and 0.379 M sodium fluoride. Addition of 0.313 moles of barium hydroxide will: (Assume that the volume does not change upon the addition of barium hydroxide.) Raise the pH slightly Lower the pH slightly Raise the pH by several units Lower the pH by several units Not change the pH Exceed the buffer capacity A 1 liter solution contains 0.363 M nitrous acid and 0.272 M potassium nitrite. Addition of 0.299...
A) A solution contains 0.424 M sodium cyanide and 0.294 M hydrocyanic acid. The pH of this solution is .B) A solution contains 0.301 M potassium fluoride and 0.204 M hydrofluoric acid. The pH of this solution is .
A buffer solution contains 0.384 M hydrofluoric acid and 0.460 M sodium fluoride. If 0.0183 moles of nitric acid are added to 125 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding nitric acid) pH = ????
A 500.0 mL buffer solution of 0.10 M hydrofluoric acid and 0.10 M potassium fluoride has an initial pH equal to 3.18 (this is the pH of the buffer solution before addition). What is the pH of the buffer solution after the addition of 0.010 moles of potassium hydroxide, KOH? Hint: Think about what is in the buffer before the addition and think about the starting molarities? What is significant about this and what value can you find from this...