**Buffer Solution Calculation****Problem Statement:**How many grams of solid **sodium fluoride** should be added to 2.00 L of a \(9.37 \times 10^{-2}\) M **hydrofluoric acid** solution to prepare a buffer with a pH of **2.622**?**Calculation Required:**grams of **sodium fluoride** = \_\_\_\_ g**Explanation:**To find the amount of sodium fluoride needed, one would typically use the Henderson-Hasselbalch equation for buffer solutions:\[ pH = pK_a + \log \left( \frac{[A^-]}{[HA]} \right) \]Where:- \( [A^-] \) is the concentration of the conjugate base (sodium fluoride),- \( [HA] \) is the concentration of the weak acid (hydrofluoric acid),- \( pK_a \) is the negative log of the acid dissociation constant (Ka) of hydrofluoric acid.In this scenario, rearrange the equation to solve for the concentration of sodium fluoride needed, and convert that to grams using the molar mass \( (NaF) \).

Answered: Image /qna-images/answer/a74cda12-5f52-474b-bd38-f3f7ffed3a30.jpg

Answered: How many grams of solid sodium fluoride…

How many grams of solid sodium fluoride should be added to 2.00 L of a 9.37x10 M hydrofluoric acid solution to prepare a buffer with a pH of 2.622? grams sodium fluoride = |g.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

How many grams of solid ammonium bromide should be added to 2.00 L of a 0.132 M ammonia solution to prepare a buffer with a pH of 8.330 ? grams ammonium bromide = -- How many grams of solid potassium cyanide should be added to 1.00 L of a 0.281 M hydrocyanic acid solution to prepare a buffer with a pH of 8.558 ?grams potassium cyanide = g.
A buffer solution contains 0.305 M hydrocyanic acid and 0.379 M sodium cyanide. If 0.0518 moles of potassium hydroxide 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 potassium hydroxide. ) pH %3D
A chemistry graduate student is given 450. mL of a 1.80M chlorous acid (HCIO,) solution. Chlorous acid is a weak acid with K= 1.1 × 10 . What mass of KC1O, should the student dissolve in the HC1O, solution to turn it into a buffer with pH = 1.92? You may assume that the volume of the solution doesn't change when the KCIO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
A chemistry graduate student is given 125. mL of a 0.90M benzoic acid (HC,H,CO2) solution. Benzoic acid is a weak acid with K,=6.3 × 10 °. - 5 What mass of NaC,H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH = 3.97? You may assume that the volume of the solution doesn't change when the NaCH,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it 2. to 2 significant digits. x10
How many grams of solid potassium cyanide should be added to 1.50 L of a 0.217 M hydrocyanic acid solution to prepare a buffer with a pH of 8.702 ? grams potassium cyanide = g.
A buffer solution contains 0.316 M KHCO3 and 0.357 M K₂CO3. If 0.0170 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 =
How many grams of solid potassium acetate should be added to 1.50 L of a 0.151 M acetic acid solution to prepare a buffer with a pH of 5.734 ? grams potassium acetate = g.
A chemistry graduate student is given 450. mL of a 1.10M dimethylamine (CH.) NH) solution. Dimethylamine is a weak base with K,=5.4 × 10 4. What mass of (CH,),NH,CI should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.89? You may assume that the volume of the solution doesn't change when the (CH,),NH,CI is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. ?
A buffer solution that is 0.488 M in HCN and 0.488 M in NaCN has a pH of 9.40. The addition of 0.01 mol of H30t to 1.0L of this buffer would cause the pH to The capacity of this buffer for added OH could be increased by the addition of 0.195 mol A solution contains 8.32×102 M potassium cyanide and 0.474 M hydrocyanic aci The pH of this solution is 9.375
How many grams of solid ammonium chloride should be added to 2.00 L of a 0.203 M ammonia solution to prepare a buffer with a pH of 8.480 ? grams ammonium chloride = g.
A chemistry graduate student is given 250. mL of a 1.80 M dimethylamine ((CH3), NH) solution. Dimethylamine is a 2 -4 weak base with K = 5.4 × 10 What mass of (CH, NH,Br should the student dissolve in the (CH,) NH solution to 2 turn it into a buffer with pH = 11.26? You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your 2 answer has a unit symbol, and round it to 2 significant digits.
How many grams of solid sodium cyanide should be added to 1.50 L of a 0.233 M hydrocyanic acid solution to prepare a buffer with a pH of 10.220 ? grams sodium cyanide = g.