0.02 M HCN are added to 1 L of distilled water at 25 oC. What is pH and pOH of the solution? pKa of HCN is 9.31.
Draw a pH - pC diagram to find pH and pOH.
10-7 moles of the strong acid HNO3 are added to 1 Lt of distilled water at 25 oC. What is the pH of the solution? Assume that activity coefficients are unity. Show all the assumptions you make.
0.001 L of 3.0 M NaOH was mixed with 0.166 L of distilled water. 0.040 L of this solution was transferred into a beaker. 0.001 L of 3.0 M HCl was added to the beaker. Calculate the pH and [H+].
Part A. Calculate the pH of a buffer solution that is 0.247 M in HCN and 0.171 M in KCN. For HCN, Ka = 4.9×10−10 (pKa = 9.31). Part B. Calculate the pH of a buffer solution that is 0.230 M in HC2H3O2 and 0.170 M in NaC2H3O2. (Ka for HC2H3O2 is 1.8×10−5.) Part C. Calculate the pH of 1.0 L of the original buffer, upon addition of 0.110 mol of solid NaOH.
Questions 1: A) Calculate the pH of a buffer solution that is 0.246 M in HCN and 0.166 M in KCN. For HCN, Ka = 4.9×10−10 (pKa = 9.31). B) Calculate the pH of a buffer solution that is 0.200 M in HC2H3O2 and 0.160 M in NaC2H3O2. (Ka for HC2H3O2 is 1.8×10−5.) C) Consider a buffer solution that is 0.50 M in NH3 and 0.20 M in NH4Cl. For ammonia, pKb=4.75. Calculate the pH of 1.0 L of the...
What volume of 1.900-M NaOH should be added to 450. mL of 1.110-M solution of HCN (pKa = 9.40) to prepare a pH = 10.25 buffer? (use acid base table)
What is the pH of a 0.500 M solution of HCN. The dissociation constant for HCN is K4 = 4.9 × 10-10. 4.81 9.31 4.65 0.301 O 1.57 10-5
Given 1 M solutions of acetic acid and sodium acetate, and distilled water, describe the preparation of 1 L of 0.1 M acetate buffer at pH = 5.4. The relevant pKa is 4.76.
10-2 moles of HCL care added to 1 liter of distilled water at 25c . find [H+], [OH-] and [Cl-] for this solution, what is the pH of the solution? demonstrate that [HCL] is negligible. assume that activity coefficients are unity.
A sample of KHP weighing 0.503 grams was placed in an Erlenmeyer flask and 100 m distilled water was added to dissolve the acid. Two drops phenolphthalein were added and a light pink endpoint was observed after the addition of 27.3 ml NaOH. What is the Molarity of the NaOH solution? Select one: O a. 0.09 M O b. 0.06 M O C. 0.07 M O d. 0.02 M
find the pH of the 25C solution resulting from the addition of (1) 10-2 moles of H2A to 1 liter of distilled water and (2) 10-2 moles of Na2A to 1 liter of distilled water. here pKa,1=4 and pKa,2=8.