what concentrations of CH3COO- and CH3COOH of those
below would give a buffer with a pH of 4.11 (pKa=
CH3COOH=4.84)
To solve this we need Handerson - Hasselbach equation for buffer and substitute values of pH and pKa and find value of log ratio of concentration .
Then we take antilog and find value of ratio of CH3COO- / CH3COOH
Now from options we find that this ratio approximately matches to option b which gives same result
Hence option b is correct .
what concentrations of CH3COO- and CH3COOH of those below would give a buffer with a pH...
6. If the pH of a CH3COOH/CH3COO- buffer system is 4.5, what is the acetate concentration if the acetic acid concentration is 0.44 and the dissociation constant, Ka, of CH3COOH is 1.6 x 10-8 ?
What must be the concentration of CH3COO- ion in 0.40 M CH3COOH to produce a buffer solution with pH = 4.80? (Ka CH3COOH = 1.8 × 10-5)
what is the ph of a buffer that contains 0.15 m ch3cooh and 0.10 m nach3coo (ka=1.8x10-5)? a. 4.74 b. 7.00 c. 4.57 d.4.92
What is the pH, amount of CH3COO- and CH3COOH in mol of a buffer synthesized from 10mL of 0.1M CH3COONa and 2.0mL of 0.1M HCl?
What would be the correct buffered pH range of the following buffer system CH3COOH(aq) +CH3COO(aq) + Haq) ; pK, = 4.76 O 9.76 - 11.76 0 4.76-6.76 O 3.76-5.76 O 2.76 -4.76
To prepare 1.0 L of a buffer that is 0.10 M CH3COOH and 0.10 M CH3COo, you can i. Add 0.10 mol of NaCH3COO (8.20 g NaCH3COO) to 1 L of 0.10 M CH3COOH ii. Add 0.10 mol of NaOH (4.00 g NaOH) to 1 Lof 0.20 M CH3COOH ili. Add 0.20 mol NaCH3COO (28.7 g NaCH3COO) to 1 L of 0.10 M HOI A. Only i B. Only ii C. Only ii D. i, ii, and ii
The Ka for acetic acid, CH3COOH, is 1.8 × 10-5. A buffer, made from 0.10 M CH3COOH and 0.10 M CH3COO- has a pH of ________. a. 4.74 b. 14.00 c. 1.00 d. 9.26 e. 7.00
6. If the pH of a CH3COOH/CH3COO buffer system is 4.5, what is the acetate concentration if the acetic acid concentration is 0.44 and the dissociation constant, Ka, of CH3COOH is 1.6 x 10-%? 7. A 23.3 g hot piece of metal at 350K is placed in pure water that has a volume of 55.0. The metal is placed in the water and after five minutes, equilibrium is established where the final temperature of the metal reaches 99.8°C. What is...
What would the concentration of CH3COO- be at pH 5.3 if 0.1M CH3COOH was adjusted to that pH (pK = 4.76)?
1. What is the pH of a buffer consisting of 0.30 M CH3COOH & 0.20 M NACH:COO? Ka= 1.8 x 10-5 2. What is the pH of the buffer with 0.10 M NH3 and 0.20 M NH4NO3? Kl = 1.8 x 10-5 3. What is the pH of a buffer formed from combining 10 mL of 0.250 M HCl with 90 mL of 0.150 M NH3? (K = 1.8 x 10-) 4. Calculate the pH of the solution that results...