Given 100.0 mL of a buffer that is 0.50 M in HOCl and 0.74 M in NaOCl, what is the pH after 10.0 mL of 1.0 M NaOH has been added? (Ka for HOCl = 3.5 × 10–8)
Select one:
a. 7.78
b. 7.46
c. 7.72
d. 7.66
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Given 100.0 mL of a buffer that is 0.50 M in HClO (Ka = 3.5 X 10-8) and 0.40 Min NaClO, what is the pH after 10.0 mL of 1.0 M NaOH has been added?
1.) 1.0 L of a buffer solution was made with 0.15M in HOCl
(Ka = 3.5 ×
10-8) and 0.25M NaOCl. If 10.0 mL of 5.0M HCl are added
into the solution, what would be the pH?
a. 7.23
b. 6.15
c. 6.98
d. 7.46
e. 7.93
You are given a 100.0 mL buffer that is 0.50 M HClO and 0.76 M in NaClO (Ka for HClO= 3.5x10^-8). What would the pH of the buffer solution change to if we added 10.0 mL 1.00 M HCl?
2. A formic acid buffer containing 0.50 M HCOOH and 0.50 M HCOONa has a pH of 3.77. What will the pH be after 0.010 mol of NaOH has been added to 100.0 mL of the buffer? A) 3.67 B) 3.78 C) 3.81 D) 3.85 E) 3.95 A buffer is prepared by adding 1.00 L of 1.0 M HCl to 750 mL of 1.5 M Nalcoo. What is the pH of this buffer? Ka = 1.7 * 104 A) 2.87...
How many moles of NaOCl must be added to 150 mL of 0.025 M HOCl to obtain a buffer solution with a pH = 7.50? Ka= 2.8×10-8 for HOCl. The answer is 3.3x10-3
5. Calculate the grams of NaCH3COO required for 100.0 mL of 0.20 M CH3COOH solution to achieve a pH of 4.40. (Assume no volume change.) K = 1.8 x 10-5 6. What is the pH of 100.0 mL of buffer consisting of 0.20 M CH3COOH/0.20 M NaCH3COO after 10.0 mL of 0.20 M HC1 was added into the solution ? Kg = 1.8 x 10-5 7. The pH of a sodium acetate-acetic acid buffer is 4.80. Calculate the ratio of...
A formic acid buffer containing 0.50 M HCOOH and 0.50 M HCOONa has a pH of 3.77. What will the pH be after 0.010 mol of NaOH has been added to 100.0 mL of the buffer? (Assume the addition cause negligible volume change.)
Calculate the following: a. The pH of a 500.0 mL buffer solution containing 0.75 M HCN (Ka = 6.2 x 10^-10) and 0.55 M NaCN b. The pH of the above buffer after the addition of 100.0 mL of 1.0 M NaOH. c. The pH of the buffer if 100.0 mL of 1.0 M HCl was added to the solution in part a.
Using a 0.25 M phosphate buffer with a pH of 7.2, you add 0.74 mL of 0.50 M NaOH to 54 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.)
To a 100.0 mL volumetric flask were added 25.0 mL of 0.74 M KH2PO4 and 50.0 mL of 0.35 M Li2HPO4. After the flask was filled to the calibration line, a 3.75 mL sample of 2.5 M sodium hydroxide was then added. Ka1= 6.4x10-8 and Ka2= 4.8x10-13 What is the pH of the initial solution before the sodium hydroxide was added? What is the pH of the final solution after the addition of the sodium hydroxide? Is the solution still...