calculate the pH of 0.09 M PH3 solition that is 20% dissociated in solution? calculate the...
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...
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.
Calculate the pH of a buffer solution that is 0.200 M in HC2H3O2 and 0.170 M in NaC2H3O2. (Ka for HC2H3O2 is 1.8×10−5.) Express your answer to two decimal places.
(a) A 0.002 M solution of HA has a pH of 3, calculate the % dissociation of the acid. (b) A 4e-4 of HA solution dissociated by 20 %. Calculate the pH of the solution. (c) A 0.03 M solution of A^- (conjugate base a HA) and 0.03 M of strong acid are combined and results with a pH of 7. What is the pH of a 0.004 M solution of HA? (d) What starting concentration of HA would be...
Calculate the [H+] and the pH of a buffer solution that is 0.20 M in HC2H3O2 and contains sufficient sodium acetate to make the [C2H3O2-] equal to 0.20 M (Ka for HC2H3O2 = 1.8 x 10-5). (For scientific notation, enter your answer as follows: 1.0e-2 for 0.010)
Calculate the pH of a buffer solution made with 0.75 M HC2H3O2 and 0.25 M NaC2H3O2 at 25 degrees Celsius. (Ka = 1.8 x 10-5) Which direction will the reaction move in when 1.0 mL of HCl is added to the above buffer solution?
20. a. Calculate the initial pH of a 0.10 M HAc solution. b. Calculate the pH after 1.5 mLs of 0.10 M NaOH solution has been added to 25.0 mLs of the acid solution. c. Calculate the volume of NaOH needed to reach the equivalence point. d. What salt is present at the equivalence point? Is it acidic, basic or neutral? e. Calculate the pH at the equivalence point and choose an appropriate indicator. f. Calculate the pH of the...
1 attempts left Check my work Be sure to answer all parts. In a 0.10 M solution, a weak acid is 1.0% dissociated. (a) Calculate the (H:0"],pH, OH), and pOH of the solution, lo 10 x 10 M [H30+] - M [OH)= pOH = pH = (b) Calculate K, of the acid.
A 0.14-M solution of a weak acid is 3.8% dissociated. Calculate K. K =
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