Question
In: Chemistry
1 a. A buffer solution is prepared by placing 5.86 grams of sodium nitrite and 32.6...
1 a. A buffer solution is prepared by placing 5.86 grams of sodium nitrite and 32.6 mL of a 4.90 M nitrous acid solution into a 500.0 mL volumetric flask and diluting to the calibration mark. If 12.47 mL of a 1.43 M solution of potassium hydroxide is added to the buffer, what is the final pH? The Ka for nitrous acid = 4.6 X 10-4.
1 b. A 0.892 liter buffer solution is prepared so that it is 0.430 M in benzoic acid (C6H5COOH) and 0.490 M in sodium benzoate (C6H5COONa). If you add 15.80 mL of a 2.53 M solution of nitric acid to this buffer solution, what is the final pH? The Ka for benzoic acid = 6.5 X 10-5.
Solutions
queen_honey_blossom answered 1 year agoRelated Solutions
if 92.8 grams of sodium nitrite are dissolved in 2.3L of water, the resulting solution has...
if 92.8 grams of sodium nitrite are dissolved in 2.3L of water,
the resulting solution has a molarity of
A buffer solution was prepared by dissolving 4.00 grams of sodium propanate (NaCH3CH2CO2, FM 96.06 g/mol)...
A buffer solution was prepared by dissolving 4.00 grams of
sodium propanate (NaCH3CH2CO2, FM 96.06 g/mol) in a solution
containing 0.100 moles of propanoic acid (CH3CH2CO2H) and diluting
the mixture to 1.00 L. pKa for propanoic acid is 4.874.
(a) To this solution was added 5.00mL of 1.00 M HCl. Calculate
the pH of the resulting solution.
(b) To this solution was added 5.00mL of 1.00 M NaOH. Calculate
the pH of the resulting solution.
1. How many grams of solid sodium nitrite should be added to 1.50 L of a...
1. How many grams of solid sodium
nitrite should be added to 1.50 L
of a 0.106 M nitrous acid
solution to prepare a buffer with a pH of
4.058?
grams sodium nitrite = _____
g.
2. How many grams of solid sodium
cyanide should be added to 1.00 L
of a 0.196 M hydrocyanic acid
solution to prepare a buffer with a pH of
10.140?
grams sodium cyanide =
_____g.
1. How many grams of solid sodium nitrite should be added to 1.50 L of a...
1. How many grams of solid sodium nitrite should be added to
1.50 L of a 0.159 M nitrous acid solution to prepare a buffer with
a pH of 4.126 ?
grams sodium nitrite = _____g
2. How many grams of solid sodium
nitrite should be added to 1.00 L
of a 0.134 M nitrous acid
solution to prepare a buffer with a pH of 4.123
?
grams sodium nitrite =
_____g.
A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared....
A buffer solution that is 0.10 M sodium acetate and 0.20 M
acetic acid is prepared. Calculate the initial pH of this
solution.
The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2
decimal places.
A buffered solution resists a change in
pH.
Calculate the pH when 21.1 mL of 0.031 M HCl is added to 100.0 mL
of the above buffer.
A buffer solution is prepared by dissolving 1.50 g each of sodium benzoate, C6H5COONa, and benzoic...
A buffer solution is prepared by dissolving 1.50 g each of
sodium benzoate, C6H5COONa, and benzoic acid, C6H5COOH (Ka = 6.45 ×
10-5), in 150.0 mL of solution. The molar mass of benzoic acid is
122.12 g/mol and that of sodium benzoate is 144.10 g/mol.
a) What is the pH of this buffer solution?
b) Which buffer component must be added to change the pH to
4.00? What mass of that component is required?
c) What volume of 2.0 M...
A solution was prepared by weighing out 6.20 grams of sodium benzoate, NaC7H5O2 along with 2.25...
A solution was prepared by weighing out 6.20 grams of sodium
benzoate, NaC7H5O2 along with 2.25 grams of benzoic acid, HC7H5O2,
and was dissolved in 750.0 mL of water. What is the pH of this
solution given that the Ka for benzoic acid is 6.61 X 10-5 .
1. A student prepares a 250.0 mL solution using 41.7 grams of potassium nitrite. They then...
1. A student prepares a 250.0 mL solution using 41.7 grams of
potassium nitrite. They then take 29.9 mL of this solution and
dilute it to a final volume of 250.0 mL. How many grams of
potassium nitrite are in a 36.2 mL sample of this final diluted
solution?
2.
If you wanted to make a 4.50 M solution of aluminum nitrate
using a 400.00 mL volumetric flask, how many grams of this salt
would you need to use?
3....
An acetic acid/ sodium acetate buffer solution was prepared using the following components: 3.46 g of...
An acetic acid/ sodium acetate buffer solution was prepared
using the following components:
3.46 g of
NaC2H3O2∙3H2O (FW. 136
g/mol)
9.0 mL of 3.0 M HC2H3O2
55.0 mL of water
-What is the total volume of the solution?
-Calculate the concentration of the
[C2H3O2-] in this
solution.
-Calculate the concentration of the
[HC2H3O2] in this solution.
-Calculate the pH of this buffer solution. The Ka for
acetic acid is 1.8x10-5.
-If you take half of this solution and add 2...
How many grams of solid sodium nitrite should be added to 1.00 L of a 0.226...
How many grams of solid sodium
nitrite should be added to 1.00 L
of a 0.226 M nitrous acid
solution to prepare a buffer with a pH of 4.305
?
grams sodium nitrite
= g.
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