7. (10 pts) Determine the pH of a 0.225 M aqueous solution of NaC; Hy02. K,...
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5. (4 pts) Calculate the pH of a 0.0025 M aqueous solution of strontium hydroxide, Sr(OH). Sr(OH)2 = Srz + 20H .0025 - x + x + 2x o rood .0025 - Kb = (2x² 4 = 6.5*103 0.0025 ) pH = 6. (6 pts) Calculate the pH of a 0.175 M NH; aqueous solution. K. for NH, is 1.8 x 10. pH = 180 7. (10 pts) Determine the pH of a...
A buffered solution with pH of 4.4 is made of 0.1 M Benzoic acid, HC-HOs, and 0.15 M Sodium benzoate, NaC;HO2. After an addition of 1.5 mLs of 6.0 M HCI to 250 mLs of the buffered solution, what is the resulting pH? Ka 6.6 x 10
6. (6 pts) Calculate the pH of a 0.175 M NH3 aqueous solution. K. for NHz is 1.8 x 105. pH = 180
Question 12 3 pts What is the pH of an aqueous 0.10 M NaC,H,O solution? O 2.82 O 8.37 O 5.82 O 11.44
8. (4 pts) What is the pH of a 0.35 M solution of aqueous ammonia, NH? (Ko for ammonia is 1.8 x 10). L 9. (5 pts) The pH of a 0.18 M solution of a weak acid, HA, is 2.85. What would be the percent ionization in a 1.80 M solution of this acid?
D Question 7 10 pts It is desired to buffer a solution at pH - 4.30. What molar ratio of CH3COOH to NaCH3COO should be used? The Ka for CH3COOH is 1.8 x 10-5. 10 pts D | Question 8 How much NH4CI must be added to 2.00 liters of 0.26 M aqueous ammonia to give a solution with pH 8.55? Assume no volume change due to the addition of NH4CI. The Kb of ammonia is 1.8 x 105, and...
Calculate the pH of a solution consisting of 0.225 M solution of CH3NH2 (methylamine) and 0.200 M CH3NH2 tor (methylammonium chloride). Report answer to 2 decimal places. Kb CH3NH2) - 44 x 10-4 CH3NH2 (aq) + H200 + CH3NH3 (2) + OH(aq) Assuming equal initial concentrations of the given species, which of the following is the weakest acid in aqueous solution? O. HB Ky = 2.0 x 10-6 OB.HD K = 6.0 x 10-2 ОС: НЕ Kg = 4.0 x...
Determine the pH of a 0.20 M KCHO2 (potassium formate) aqueous solution. [Ka for HCHO2 = 1.8 x 10-4]. Use ice table.
7) Calculate the K of butinoic acid (margrotis)ifa 0.025 M aqueous solution has a pH of 3.21 a 25°C. 8) trans-cinnamic acid (C.H.Oz; monoprotic) has a K = 3.60 x 10-5 a. Calculate the pH of a 0.020 M aqueous solution of this acid. ON -OSI b. Calculate the percentage of acid dissociated (ie, in the "A" form) in this solution using your calculations in (a). 0.8 Ho CHEM 120B-Activity #3 Acids and Bases Page 5 of 12
If a solution of acetic acid (K = 1.8 x 10-5) has a pH of 2.90, calculate the original (initial) concentration of acetic acid (HC,H,O) (Report your answer in 1 sig. fig. Example: .03942 would be reported as 0.04) Be sure to include a zero in front of the decimal point. QUESTION 37 5 points Save Answer The K, for benzoic acid C.H.COOH is 6.3 x 106. Calculate the equilibrium concentrations of H,0* in the solution if the initial concentration...