A. If 200 mls of 0.02 M HCl is added to 800 mls of 0.2 M glycine buffer at pH 10.4, what is the resultant pH? (pK1 for Gly= 2.2, Pk2=9.4)
B. What would the pH be if the same amount of HCl as in part A was added to 400 mls of water?
C. If 200 mls of 0.02 M HCl is added to 300 mls of 0.5 M proline buffer at pH 11.6, what is the resultant pH? (pK1 for Pro= 2.2, Pk2=10.6)
6. How many mL of 0.2 M sodium acetate should be added to 200 mL of 0.2 M acetic acid to make a buffer of pH 5.5? (refer to Table 2-2 on page 60 for pKa values). What is the molarity of the resulting buffer with respect to acetate (acetate + acetic acid)? 7. How many mL of 0.2 M HCl should be added to 50 mL of 0.2 M Tris base (Trishydroxymethyl aminomethane) to make a buffer of pH...
When 12 mL of 0.2 M NaOH is added to 25 mL of 0.15 M HCl, what is the pH of the solution? When 12 mL of 0.2 M NaOH is added to 25 mL of 0.15 M acetic acid, would this solution be considered a buffer? Explain your answer. What is the pH of the solution in number 2?
5. 1.5 mLs of 6 M HCl are added to 250 mL of water (pH=7.0). What is the resulting (H') and the final pH?
14. To prepare a buffer, 50 mLs of 0.120 M NaOH was added to 30 mLs of 0.250 M HAc. a. Write the net ionic equation for the reaction. b. What is the molarity of the Ac present in the final solution? c. What is the molarity of the acetic acid in the final solution? d. What is the pH of the resulting buffer? cing conacity and which one has the least?
5.0 mL of 0.2 M HCl is added to 50.0 mL of 0.05 M solution of NaOH and diluted with distilled water to 150 mL. Find pH of solution.
9.30 mL of 0.1 M HCl are added to 200 mL of the buffer solution prepared in #8. What is the resulting pH? 8. A buffer solution is made by adding 20.4 grams of sodium acetate (NaCH CO2) toa 0.2M acetic acid (CH,CO2H) solution. The total volume of the resulting solution is exactly 1L. What is the phH of this solution? (Note: the pK, of acetic acid is 4.74) 20.4q NaCH3(02 82.034 9/mO 8203y g/mol .25 025 nol 1.0しー= 0.25mol...
Calculate the pH after 25 mL of 0.2 M HCl is added to 50 mL of 0.2 M CH3COONa? The Ka for CH3COOH is 1.8 x 10-5 4.44 4.74 5.04 O 1.17
Calculate the pH of the acetate buffer after 28.00 mL 0.100 M HCl has been added. There is 10 mL of the acetate buffer (0.16 M NaC2H3O2 / 0.2 M HC2H3O2) mixed with 30 mL of water in the buffer solution. The Pka of the buffer is 4.74. Ka = 1.76 x 10^-5 Please help, I've made ICE tables and tried using ph = pka +log (base/acid) and the pH I get is bigger than it should be. As more...
If 0.2 M HCl is added to an equal volume of 0.4 M NaOH, what are the new concentrations of OH- and H3O+ ?
A solution containing 0.3M of HF also contains 0.02 M Ca(NO3)2. HCl is added slowly until the solution has a pH of 2.00. Will a precipitate of CaF2 occur? For the HF, Ka = 6.46x10-4 and for the CaF2, Ksp = 2.69x10-11