3. What pH would be obtained by adding 5 mL of 0.100 M NaOH to 20 mL of a 0.100 M NH3/NH Cl buffer LE with a pH of...
Calculate the pH of a solution prepared by adding 20.0 mL of 0.100 M HCl to 80.0 mL of a buffer that is comprised of 0.25 M NH3 and 0.25 M NH4Cl. Kb of NH3 = 1.8 x 10-5. ОА. 9.17 ОВ. 4.83 0 o С. 9.34 OD.9.26 OE. 4.66
0.100 M NH, 1.8x10-5 5. You need to make 500.0 mL of a buffer with a pH of 2.20. You have the following substances to work with: Solid NaN, Solid NaCIO 0.100 M HCIO 1X10-2 Solid NH.CI Solid Na,so 0.100 M HN, 1.9x10-5 Solid NaHSO (Necessary K, values are listed on the last page) (Assume that the addition of solid does not change the volume of the solution it's added to) a. Describe how you would make this buffer using...
A 5.40 g sample of NH Cl was added to 24.5 mL of 1.19 M NaOH and the resulting solution diluted to 0.100 L. (Assume K-1.01x 10,) (a) What is the pH of this buffer solution? 8.86 (b) Is the solution acidic or basic? acidic basic (c) What is the pH of the solution that results when 3.20 mL of 0.033 M HCI is added to this buffer solution? 4 5.15
V Gve Up Resources Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M i NH, (aq) and 0.100 M in NH Cl(aq). Consult the table of ionization constants as needed. ApH Calculate the change in pH when 4.00 mL of 0.100 M NaOH is added to the original buffer solution. ApH=
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH, (aq) and 0.100 M in NH, Cl(aq). Consult the table of ionization constants as needed. ApH = Calculate the change in pH when 7.00 mL of 0.100 M NaOH is added to the original buffer solution. ApH =
Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH, (aq) and 0.100 M in NH Cl(aq). Consult the table of ionization constants as needed. ApH = Calculate the change in pH when 4.00 mL of 0.100 M NaOH is added to the original buffer solution. ApH =
a) Calculate the pH of the resulting solution obtained by adding 10.00 mL of 0.200 M HCl (strong acid) to 7.50 mL of 0.100 M NaOH (strong base). b) Calculate the pH of the resulting solution obtained by adding 10.00 mL of 0.200 M CH3CO2H (weak acid) to 7.50 mL of 0.100 M NaOH (strong base).
38. A buffer solution is 0.40 M NH3 and 0.60 M NHACI. Kb for NH3 is 1.8 x 10-5 a) Calculate the pH for the buffer system. b) Calculate the pH of the solution after adding 0.00600 moles of NaOH to 400.0 mL of the buffer. c) Calculate the pH of the solution after adding 0.050 moles of HCl to 600.0 mL of the buffer.
5. How many mL of 0.100 M NaOH S produce a buffer pH 4.07 pka acetic acid = 4.757. ANSWER: 112 mL nl of 0.100 M NaOH should be added to 500.0 mL of 0.150 M acetic acid to
3. (a) Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). (b) Calculate the change in pH when 5.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.