c is the right answer.
.
Please post other questions separately
22) What is the [CH3CO2-1/[CH3CO2H] ratio necessary to make a buffer solution with a pH of...
What is the [CH3CO2-]/[CH3CO2H] ratio necessary to make a buffer solution with a pH of 4.44? The Ka for acetic acid is 1.76 x 10^-5. The answer choices are A) .39:1 B) .49:1 C) 1.07:1 D) 1.33:1 E) 4.44:1 It is NOT A according to my professor counting that wrong on the exam, I just want the answer and how it works please!
What is the pH of an acetic acid/sodium acetate buffer with [CH3CO2H] = 0.850 M and [CH3CO2-] = 0.550 M? Ka for acetic acid = 1.8×10-5 pH =
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...
What is the buffer component ratio, (NO2-)/(HNO2) of a nitrite buffer that has a pH of 2.96. Ka of HNO2 is 7.1 x 10-4.
1. (2pts) What is the pH of a buffer solution in which [HA] = [AC]? A. pH = 1 D. pH = POH B. pH = Ka E. pH=7.0 C. pH = pka
Form 1 29. Determine the pH of a 0.741 M LiOH solution at 25°C. A) 0.130 B) 13.87 C) 0.741 D) 13.26 E) 1.18 30. What is the hydronium ion concentration of a 0.500 M acetic acid solu Ka = 1.8 x 10-5? The equation for the dissociation of acetic acid is: centration of a 0.500 M acetic acid solution with CH3CO2H(aq) + H2O(1) = H30+(aq) + CH3CO2"(aq) A) 3.0 x 10-2 M B) 4.2 x 10-2 M C) 3.0...
1. What is the pH of a buffer solution prepared with a 0.4 M sodium citrate and 1% citric acid (pka for citric acid - 3.13, MW - 192 g/mol)? 8. A buffer solution is prepared using 0.4 mole of a weakly basic drug (pka - 10.1) and an unknown quantity of its salt. The final solution has a pH of 8.99. How much of the salt was used? 9. A buffer solution with a desired pH of 8.15 needs...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a Ka - 7.1 x 104 and its conjugate base. a. What pH would provide maximum buffer capacity? b. What would be the buffer range for this acid? (Your answer should show the lowest and the highest pH that would provide a reasonably effective buffer.) 2. If you were provided with a 0.1 M solution of an unknown weak acid and a 0.1 M solution...
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...
7) 2 OY- A) X- ) - - - D) X->Z- Y- 7 Which one of the following sales when dissolved in water, produces the solution with the lowest A) CAC B) KCI с ква D) AICI pH? D) 2.29 C) 3.89 ) What is the prior a 0.20 M R esolution that has the stepwise dissociation constants Kal-13 10-4 and ka21010-117 A) 5.57 B) 4.59 D) 12.00 10) - 9) What is the pH of a solution prepared by...