a) From the list below, pick an acid, along with its conjugate base, that can be...
a) From the list below, pick an acid, along with its conjugate base, that can be used to make a pH 7.40 buffer.
H3PO4 Ka = 6.9 x 10^-3
H2PO4- Ka = 6.4 x 10^-8
HPO42- Ka = 4.8 x 10^-13
b) If you have 0.100 M solutions of the acid and the conjugate base in the system that you picked and there was 20.0 mL of the base, how many mL of the acid would you need to make this buffer of pH 7.40?
Homework Answers
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a) From the list below, pick an acid, along with its conjugate
base, that can be...
From the list below, pick an acid, along with its conjugate base, that can be used...
From the list below, pick an acid, along with its conjugate base, that can be used to make a pH 7.40 buffer. H3PO4 Ka = 6.9 x 10-3 H2PO4- Ka = 6.4 x 10-8 HPO42- Ka = 4.8 x 10-13
Design a buffer that has a pH of 4.77 using one of the weak acid/conjugate base...
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid systems shown below. Weak Base Kb Conjugate Acid Ka pKa CH3NH2 4.2×10-4 CH3NH3+ 2.4×10-11 10.62 C6H15O3N 5.9×10-7 C6H15O3NH+ 1.7×10-8 7.77 C5H5N 1.5×10-9 C5H5NH+ 6.7×10-6 5.17 How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams chloride...
1. Identify the acid, base, conjugate acid and conjugate base in the following reaction: HPO42+ H20...
1. Identify the acid, base, conjugate acid and conjugate base in the following reaction: HPO42+ H20 OH H2PO4 2. Calculate the following a) pH of a [H30*] = 2.76 x 104 M b) pH of a [OH] - 8.5 x 10-6 M c) [H30*] and [OH] for a soln pH 5.73 3. Show how an incoming acid [H30*] is neutralized by the buffer system HCO3 /CO32 system. You should also be able to show the neutralization of incoming base [OH']...
stopн спанде Choose an appropriate weak acid and conjugate base from the list below to make 100 ml of a 0.100M buff...
stopн спанде Choose an appropriate weak acid and conjugate base from the list below to make 100 ml of a 0.100M buffer solution that has a pH of 7.4. Weak acid Acetic acid Phthalic acid Dihydrogen phosphate (monobasic) Monohrogen phosphate (dibasic) Carbonic acid Citrate Dihydrogen citrate (monobasic) Monohydrogen citrate (dibasic) K. 1.8 x 10 1.3 x 10 6.2 x 10 4.8 x 10 4.6 x 10 8.4 x 10° 1.8 x 10 4.0 x 10- In your notebook, show all...
You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH...
You are instructed to create 400. mL of a 0.40 M
phosphate buffer with a pH of 6.4. You have phosphoric acid and the
sodium salts NaH2PO4,
Na2HPO4, and Na3PO4
available. (Enter all numerical answers to three significant
figures.)
H3PO4(s) +
H2O(l)
H3O+(aq) +
H2PO4−(aq)
Ka1 = 6.9 ✕ 10−3
H2PO4−(aq) +
H2O(l)
H3O+(aq) +
HPO42−(aq)
Ka2 = 6.2 ✕ 10−8
HPO42−(aq) +
H2O(l)
H3O+(aq) +
PO43−(aq)
Ka3 = 4.8 ✕ 10−13
Which of the available chemicals will you use...
Consider how best to prepare one liter of a buffer solution with pH = 10.93 using one of the weak...
Consider how best to prepare one liter of a buffer solution with pH = 10.93 using one of the weak acid/conjugate base systems shown here. Weak Acid Conjugate Base Ka pKa HC2O4- C2O42- 6.4 x 10-5 4.19 H2PO4- HPO42- 6.2 x 10-8 7.21 HCO3- CO32- 4.8 x 10-11 10.32 How many grams of the sodium salt of the weak acid must be combined with how many grams of the sodium salt of its conjugate base, to produce1.00 L of a...
Consider how best to prepare one liter of a buffer solution with pH = 3.36 using...
Consider how best to prepare one liter of a buffer solution with pH = 3.36 using one of the weak acid/conjugate base systems shown here. Weak Acid Conjugate Base Ka pKa HC2O4- C2O42- 6.4 x 10-5 4.19 H2PO4- HPO42- 6.2 x 10-8 7.21 HCO3- CO32- 4.8 x 10-11 10.32 How many grams of the sodium salt of the weak acid must be combined with how many grams of the sodium salt of its conjugate base, to produce 1.00 L of...
(17.2.c.6) Consider how best to prepare one liter of a buffer solution with pH = 10.76...
(17.2.c.6) Consider how best to prepare one liter of a buffer solution with pH = 10.76 using one of the weak acid/conjugate base systems shown here. Weak Acid Conjugate Base Ka pKa HC2O4- C2O42- 6.4 x 10-5 4.19 H2PO4- HPO42- 6.2 x 10-8 7.21 HCO3- CO32- 4.8 x 10-11 10.32 How many grams of the sodium salt of the weak acid must be combined with how many grams of the sodium salt of its conjugate base, to produce 1.00 L...
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base...
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base PO42-. The chemical equation for the buffer is H2PO4 + H20 = P042- + H30+ Calculate the pH of the buffer solution knowing that Ka-6.3x10-8
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
1. Identify the acid, base, conjugate acid and conjugate base in the following reaction: HPO42+ H20 OH H2PO4 2. Calculate the following a) pH of a [H30*] = 2.76 x 104 M b) pH of a [OH] - 8.5 x 10-6 M c) [H30*] and [OH] for a soln pH 5.73 3. Show how an incoming acid [H30*] is neutralized by the buffer system HCO3 /CO32 system. You should also be able to show the neutralization of incoming base [OH']...
stopн спанде Choose an appropriate weak acid and conjugate base from the list below to make 100 ml of a 0.100M buffer solution that has a pH of 7.4. Weak acid Acetic acid Phthalic acid Dihydrogen phosphate (monobasic) Monohrogen phosphate (dibasic) Carbonic acid Citrate Dihydrogen citrate (monobasic) Monohydrogen citrate (dibasic) K. 1.8 x 10 1.3 x 10 6.2 x 10 4.8 x 10 4.6 x 10 8.4 x 10° 1.8 x 10 4.0 x 10- In your notebook, show all...
You are instructed to create 400. mL of a 0.40 M
phosphate buffer with a pH of 6.4. You have phosphoric acid and the
sodium salts NaH2PO4,
Na2HPO4, and Na3PO4
available. (Enter all numerical answers to three significant
figures.)
H3PO4(s) +
H2O(l)
H3O+(aq) +
H2PO4−(aq)
Ka1 = 6.9 ✕ 10−3
H2PO4−(aq) +
H2O(l)
H3O+(aq) +
HPO42−(aq)
Ka2 = 6.2 ✕ 10−8
HPO42−(aq) +
H2O(l)
H3O+(aq) +
PO43−(aq)
Ka3 = 4.8 ✕ 10−13
Which of the available chemicals will you use...
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base PO42-. The chemical equation for the buffer is H2PO4 + H20 = P042- + H30+ Calculate the pH of the buffer solution knowing that Ka-6.3x10-8
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