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Newest Buffer Solutions Questions

1. Strong base is dissolved in 665 ml. of 0.200 M weak acid (K, 4.73 x 10-5) to make a buffer with a pH of 4.10, Assume that the
   1. 1 answer
   2. 74 views
2. Strong base is dissolved in 665 ml. of 0.200 M weak acid (K, 4.73 x 10) to make a buffer with a pH of 4.10. Assume that the
   1. 1 answer
   2. 40 views
3. Strong base is dissolved in 665 ml. of 0.200 M weak acid (K, 4.73 x 10) to make a buffer with a pH of 4.10. Assume that the
   1. 1 answer
   2. 27 views
4. What is the pH of a buffer made by mixing 1.00 L of 0.020 M benzoic acid, HC,H,O,, with 3.00 L of 0.060 M sodium benzoate,NaC
   1. 1 answer
   2. asked by James
   3. 169 views
5. Suppose that 0.10 liter of 0.50 molar hydrochloric acid is added to 0.040 liter of the bufferprepared in (b). Compute the
   1. 1 answer
   2. asked by Psy
   3. 171 views
6. A volume of 500.0 mL of 0.160 M NaOH is added to 625 mL of 0.250 M weak acid (𝐾a=1.95×10−5). What is the pHof the
   1. 1 answer
   2. asked by Lee
   3. 124 views
7. If a buffer solution is 0.100 M in a weak acid ( 𝐾a=4.9×10−5) and 0.440 M in its conjugate base, what is the pH?
   1. 2 answers
   2. asked by Drew
   3. 273 views
8. With the same initial solution of 0.75 moles formate and 0.85 moles formic acid to make a buffer solution. The Ka of formic acid
   1. 4 answers
   2. asked by Zin
   3. 757 views
9. A buffer is prepared by dissolving 0.0250 mol sodium nitrite in 250 mL of 0.0410 Mnitrous acid. Assuming no volume change from
   1. 7 answers
   2. asked by Anonymous
   3. 723 views
10. A 1.0L buffer solution contains 0.100 mol of HC2H3O2and 0.100 mol of NaC2H3O2 The value of Ka for HC2H3O2 is 1.8×10−5.
    1. 1 answer
    2. asked by Anonymous
    3. 1,353 views
11. what is the pH of a buffer that is 0.76 Min HF and 0.98 M in NaF
    1. 1 answer
    2. asked by Fred
    3. 804 views
12. What are the concentrations of HOAc and OAc- in a 0.2 M “acetate” buffer, pH 5.0? The Ka for acetic acid 1.70x10-5 (pKa
    1. 3 answers
    2. asked by Noura
    3. 1,571 views
13. Calculate the PH of a buffer solution by mixing 74ml of 1.0M lactic acid and 25ml of 1.0 sodium lactate having a Pka of 3.86
    1. 2 answers
    2. asked by Serah
    3. 1,123 views
14. Calculate the pH of a buffer formed by mixing 85 mL of 0.16 M nitrous acid (HNO2, Ka = 4.6X10^-4) with 94 mL of 0.15 M sodium
    1. 1 answer
    2. asked by Nada
    3. 719 views
15. How many grams of Na2SO3 (Sodium Sulfite) must be added to 225 mL of 0.0777 M sulfurous acid (H2SO3) to prepare a buffer at pH =
    1. 1 answer
    2. asked by James
    3. 840 views
16. Calculate the ratio of the concentration of CO3-2 & HCO3- ions needed to achieve buffering at pH= 9.50. The PkA2 of H2CO3 is
    1. 1 answer
    2. asked by Zekariyas
    3. 1,663 views
17. Given a PH of buffer solution is 4.23 made from 0.35 formic acid. Calculate the concentration of formate.The constant
    1. 1 answer
    2. asked by zephaniah
    3. 706 views
18. 3. Determine the pH if 0.02 mol of NaOH is added to 1.0L of the buffer described in question #1.question1: 1. How many grams of
    1. 1 answer
    2. asked by KO
    3. 787 views
19. A buffer was prepared by mixing 0.1 M ch3cooh with 0.1M ch3cooNa in the ratio 8:2. Calculate ph after the addition of 2mL of 0.1
    1. 2 answers
    2. asked by Bobby
    3. 683 views
20. Calculate the pH of 0.250 L of a 0.65 M formic acid (HCO2H) - 0.10 M sodium formate (HCO2Na) buffer before (on your own) and
    1. 1 answer
    2. asked by Tyler
    3. 730 views
21. You need to use KH2PO4 and K2HPO4 to prepare a buffer with a pH of 7.45. Which of the following ratios of [base]/[acid] is
    1. 1 answer
    2. asked by Jenny
    3. 2,227 views
22. The ionization constant of HA is 1 × 10−6. What must be the ratio of [A−] to [HA] for the preparation of a buffer solution
    1. 0 answers
    2. asked by Avery
    3. 810 views
23. calculate the initial concentration of HCOONa you would add to 0.10M HCOOH to make a buffer with a pH of 4.00 [Ka (HCOOH) = 1.8
    1. 1 answer
    2. asked by Christabel
    3. 657 views
24. 1.)An ammonia/ammonium buffer solution contains 0.35 M NH3 and 0.72 M NH4+. The Kb value of ammonia is 1.8×10−5. Calculate
    1. 1 answer
    2. asked by LuigiR
    3. 1,377 views
25. What is the pH of a buffer solution that has CH3CO2H=0.68 M and CH3CO2- =0.58 M, and has 0.01 M concentration of H2SO4 added to
    1. 1 answer
    2. asked by Randy
    3. 646 views
26. What is the (H3O+) andthe ph of a buffer that consists of 0.25M HNO2 and 0.69M KNO2? (Ka of HNO2 = 7.1 x 10^-4) is this right?
    1. 2 answers
    2. asked by patrick
    3. 1,274 views
27. You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an
    1. 1 answer
    2. asked by Owen
    3. 527 views
28. A buffer is made by mixing 100 mL of 0.25 M acetic acid (CH3COOH) and 150 mL of 0.10 M sodium acetate (CH3COONa). Calculate the
    1. 2 answers
    2. asked by Jaden
    3. 1,104 views
29. 10 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.1 M C2H3O2-. What is the pH of the
    1. 1 answer
    2. asked by Renata
    3. 542 views
30. For 520.0mL of a buffer solution that is 0.140M in HC2H3O2 and 0.125M in NaC2H3O2, calculate the initial pH and the final pH
    1. 2 answers
    2. asked by jess
    3. 940 views
31. The pKa of acetic acid is 4.74. What is the buffering range of this acid and its conjugate base? Explain.
    1. 1 answer
    2. asked by Sara
    3. 2,768 views
32. What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb
    1. 1 answer
    2. asked by paula
    3. 1,725 views
33. You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.220 M sodium benzoate.Ho
    1. 1 answer
    2. asked by Ana
    3. 728 views
34. To have a buffer with a pH of 2.50, what volume of 0.510 M NaOH must be added to 100. mL of 0.230M H3PO4?
    1. 0 answers
    2. asked by Shannon
    3. 604 views
35. Propanoic acid that, along with its sodium salt, can be used to make a buffer that has a pH of 5.25. If you have 532.9 mL of a
    1. 1 answer
    2. asked by Dinna
    3. 591 views
36. The pH of a 25.0 mL sample of a buffer changed by one unit when 4.19 mL of 0.24 M HCl was added to it. What is the acid buffer
    1. 1 answer
    2. asked by Cole
    3. 668 views
37. What mass of solid sodium acetate, NaCH3COO, must be added to 2.50 L of an aqueous solutionof 0.55 M acetic acid, CH3COOH, in
    1. 0 answers
    2. asked by airman
    3. 688 views
38. What is the solubility of CaF2 in a buffer solution containing 0.45M formic acid and 0.20M sodium formate?Given: Ka for formic
    1. 1 answer
    2. asked by Tina
    3. 1,596 views
39. d 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka-7.1 x 10, and 0.40 M NaF at a pH of
    1. 1 answer
    2. asked by Always
    3. 520 views
40. Calculate the pH of a buffer solution made by mixing 231 mL of a 1.04M trimethylamine (CH3)3N solution with 176 mL of a 1.38M
    1. 1 answer
    2. asked by Bill
    3. 741 views
41. How many grams of dry NH4Cl need to be added to 2.00L of a 0.100M solution of ammonia, NH3, to prepare a buffer solution that
    1. 1 answer
    2. asked by Jennifer
    3. 1,070 views
42. Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mMsodium acetate. When a 30 mM aq solution
    1. 4 answers
    2. asked by Sarah
    3. 899 views
43. 500 ml of a buffer solution with ph=2.10 must be prepared using .4 M HNO2 and solid KNO2. The ka value of HNO2 is 4e-3.a.) What
    1. 1 answer
    2. asked by Anonymous
    3. 872 views
44. If you need to prepare 250.0 mL of a pH 5.00 buffer that has a total buffer concentration of acetic acid + sodium acetate of
    1. 2 answers
    2. asked by Natalie
    3. 1,631 views
45. What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M
    1. 1 answer
    2. asked by Yanis
    3. 516 views
46. The pK3 of formic acid is 3.75A)what is the pH of a buffer in which formic acid and sodium formate have equimolar concentration?
    1. 4 answers
    2. asked by Liz
    3. 2,462 views
47. I need help starting this question...A buffer solution is prepared by adding 30.0g of pure acetic acid to 41.0g of sodium
    1. 1 answer
    2. asked by a Canadian
    3. 811 views
48. The question is: what is the ratio [NH3/[NH4+] in an ammonia/ammonium chloride buffer solution with pH= 10.00? (pKa for
    1. 1 answer
    2. asked by Marcus
    3. 2,843 views
49. Calculate the change in pH if 0.050 g of solid NaOH is added to 250 mL of a buffer solution that contains 0.80 M NaH2PO4 and
    1. 0 answers
    2. asked by Matt
    3. 879 views
50. Phosphoric acid is a triprotic acid with the following pKa values:pKa1=2.148 pKa2=7.198 pKa3=12.375 You wish to prepare 1.000 L
    1. 1 answer
    2. asked by Laura
    3. 1,038 views
51. What is the hydronium ion concentration of a buffer solution that is 0.10M NaHPO4 and 0.50M NaH2PO4? For H3PO4,Ka1=6.9x10^-3,
    1. 3 answers
    2. asked by Viv
    3. 775 views
52. You make 1.00 L of a buffered solution (pH = 5.10) by mixing propanoic acid and potassium propanoate. You have 1.00 M solutions
    1. 0 answers
    2. asked by Margaret
    3. 718 views
53. How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the
    1. 1 answer
    2. asked by Victoria
    3. 2,999 views
54. a buffer prepared by mixing equal moles of an acid having Ka=4.5x10^-4 and a salt of its conjugate base has a pH of what?
    1. 1 answer
    2. asked by sarah
    3. 1,857 views
55. How many moles of hydrochloric acid (pKa of HF=3.14) must be added to 500.0 mL of 0.30M sodium fluoride (NaF) to give a buffer
    1. 2 answers
    2. asked by Millie
    3. 534 views
56. I keep getting the last part of this question wrong.Strong base is dissolved in 765 mL of 0.200 M weak acid (Ka = 4.63 x 10^-5)
    1. 1 answer
    2. asked by Katherine
    3. 1,893 views
57. If a buffer solution is 0.190 M in a weak acid (Ka = 5.8 x 10^-5) and 0.550 M in its conjugate base, what is the pH?What if it
    1. 2 answers
    2. asked by Katherine
    3. 1,529 views
58. Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0
    1. 1 answer
    2. asked by Frank
    3. 844 views
59. What is the CHANGE in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M
    1. 1 answer
    2. asked by Morgan
    3. 1,731 views
60. Calculate the correct volumes of the 0.1M acetic acid solution and the 0.1M sodium acetate solution needed to make 50mL of a
    1. 1 answer
    2. asked by Keighley
    3. 990 views
61. A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^-5
    1. 1 answer
    2. asked by Daniel
    3. 1,086 views
62. Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the
    1. 1 answer
    2. asked by Alexander
    3. 684 views
63. Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the
    1. 3 answers
    2. asked by Alex
    3. 3,645 views
64. Calculate the pH of the solution that results from the addition of 12.00mL of 0.225M HNO3 to 20.00mL of 0.210M NH3. Buffer
    1. 4 answers
    2. asked by Anonymous
    3. 783 views
65. If one added 130 mL of 2 M NaOH to 1 L of a buffer composed of 2.3 M NH3 and 3.2 M NH4Cl, what would be the pH of the resulting
    1. 1 answer
    2. asked by Anna
    3. 1,303 views
66. what is the pH range of the buffering region?is that when ph=pKa?
    1. 3 answers
    2. asked by Tom
    3. 591 views
67. A buffer was made by mixing 0.1522 moles of HCO2H with 0.1832 moles LiHCO2- and diluting to exactly 1L. What will be the pH
    1. 1 answer
    2. asked by Jude
    3. 670 views
68. COMMON ION EFFECT1.) What is the pH of a solution that is 0.30M in HCOOH and 0.52M in HCOOK. Ka of HCOOH=1.7x10^-4. 2.)
    1. 1 answer
    2. asked by jaycab
    3. 674 views
69. What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 25.00 mL of 12 M NH3 in enough water to make
    1. 1 answer
    2. asked by emoni
    3. 1,867 views
70. A buffer is prepared by mixing 205 mL of .452 M HCl and .500 L of .400 M sodium acetate. Ka =1.80 x 10^-5I got the pH is 4.79
    1. 1 answer
    2. asked by Yumi
    3. 733 views
71. A buffer is prepared by mixing 205 mL of .452 M HCl and .500 L of .400 M sodium acetate. (Ka =1.80 x 10^-5)a) What is the pH? b)
    1. 2 answers
    2. asked by Missy
    3. 885 views
72. In a buffer solution, if [Aƒ{] < [HA], which of the following must be true?a. pH < pKa b. pH = pKa c. pH > pKa d. pH < 7.00 e.
    1. 3 answers
    2. asked by miller
    3. 2,669 views
73. A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine whether or noteach of the following additions would
    1. 3 answers
    2. asked by Johannie
    3. 3,970 views
74. I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not
    1. 1 answer
    2. asked by moe
    3. 823 views
75. What is pH of the buffer 0.1 mol L-1 Na2HPO4/0.15 mol L-1 KH2PO4?(Given Ka(H2PO4-)=6.2x10 power-8). Sorry if the power is
    1. 0 answers
    2. asked by Elleni
    3. 658 views
76. A lactic acid/lactate ion buffer solution contains 0.19 M HC3H5O3 and 0.78 M C3H5O3-, respectively. The Ka value of lactic acid
    1. 1 answer
    2. asked by Lynne
    3. 786 views
77. Is 10.0 mL of 0.10 M NH4Cl added to 10.0 mL of 0.10 M HCl a basic buffer?I think Yes. Right?
    1. 1 answer
    2. asked by Jim
    3. 725 views
78. Is 50.0mL of 1.0 MHF and 50.0 mL of 1.0M NaOH a buffer solution with a pH of 3?
    1. 2 answers
    2. asked by Bill
    3. 503 views
79. A buffer contains 5.00 M acetic acid and 5.00 M acetate anion. Gaseous HCl (0.010 mole) is added to 1.00 L of this buffer
    1. 1 answer
    2. asked by Ivana
    3. 1,348 views
80. A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml
    1. 1 answer
    2. asked by jess
    3. 1,442 views
81. If you add 2.50 mL of .150 M HCl to 100 mL of a buffer consisting of .100 M CH_3COOH and .200 M CH_3COONa, what will be the
    1. 1 answer
    2. asked by Jason
    3. 709 views
82. Calculate the pH of the buffer solution that results when 10 mL of 0.10 M NaH2PO4 is added to 3 mL of 0.05 M NaOH.
    1. 1 answer
    2. asked by pat
    3. 756 views
83. Buffers- Common Ion effectIS this Correct Calculate the pH of a aqueous solution containing 0.15 M HNO2 and 0.20 M NaNO2 (aq).
    1. 1 answer
    2. asked by Saira
    3. 1,426 views
84. How many grams of dry NH4Cl need to be added to 1.80L of 0.200M solution of ammonia,NH3, to prepare a buffer that has a pH of
    1. 4 answers
    2. asked by Jennifer
    3. 1,708 views
85. Posted by Kat on Monday, March 2, 2009 at 11:21am.A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If
    1. 3 answers
    2. asked by Kat
    3. 700 views