What is the pH of a buffer made by combining 0.55 mol of C5H5N with 0.86 mol of C5H5NHBr in 100.0 mL of solution? Kb C5H5N = 1.7 x 10-9
What is the pH of a buffer made by combining 0.55 mol of C5H5N with 0.86...
You have four solutions below. a) pure water b) 0.400M solution of C5H5N and 0.250 M C5H5NHBr c) 0.500M solution of C5H5NHBr d) 0.500M solution of pyridine, C5H5N. (Kb=1.7 x 10-9) Find the pH of a, b, and d. Show all work with steps.
What is the pH of a .62 M [C5H5NH]NO3 solution? Kb(C5H5N) = 1.7 x 10-9 Kb(NH3) = 1.8 x 10-5
Calculate the pH of a 0.20 M solution of the weak base pyridine. (C5H5N; Kb = 1.7 x 10-9). What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 ´ 10–5]
16 What is the pH of a 1.63 M solution of pyridine (C5H5N; Kb = 1.7 x 10-9)? [ (4 Puan) 9.72 10.07 9.07 5.23 8.77
What is the pH of a buffer made by combining 181 mL of 0.34 M NaC2H2O2 with 170 mL of 0.28 M HC2H2O2? The K, of acetic acid is 1.75 x 10-5. 4.88 4.64 O 5.93 4.83 O 5.38
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16. What is the pH of a buffer made by combining 230 mof 0.41 M NaC2H02 with 110 mL of0.34 M HC2HO? The Ka of acetic acid is 1.75 x 10 17. A5.80-g sample of homogentisic acid, a weak organic acid having K -4.0 x 105, is dissolved in 25.00 mL of water and its pH is measured to be 2.130. What is the molar mass of homogentisic acid?
THe Kb of ammonia is 1.76*10-5. What is the pH of a buffer which is prepared by combining 50.0 mL of 1.21 M ammonia and 45.0 mL of 0.86 M ammonium nitrate? A) 9.44 B) 9.05 C) 9.25 D) None of the above E) 4.94
a) What is the pH of a buffer made by combining 0.025 moles potassium acetate with 0.015 moles acetic acid in 200 mL of water? 8.97 b)What is the new pH if 0.5 mL of 10 M HCl is added to the buffer in part a? 9.20
What is the pH of a buffer made from 0.580 mol of CH₃NH₂ (Kb = 4.4 × 10⁻⁴) and 0.220 mol of CH₃NH₃I?
Calculate the following: a. The pH of a 500.0 mL buffer solution containing 0.75 M HCN (Ka = 6.2 x 10^-10) and 0.55 M NaCN b. The pH of the above buffer after the addition of 100.0 mL of 1.0 M NaOH. c. The pH of the buffer if 100.0 mL of 1.0 M HCl was added to the solution in part a.