Question

Consider how to prepare a buffer solution with pH =
**9.32** (using one of the weak acid/conjugate base
systems shown here) by combining **1.00** L of a
**0.427**-M solution of weak acid with
**0.284** M **sodium
hydroxide**.

Weak Acid | Conjugate Base | K_{a} |
pK_{a} |
---|---|---|---|

HNO |
NO |
4.5 x 10 |
3.35 |

HClO |
ClO |
3.5 x 10 |
7.46 |

HCN |
CN |
4.0 x 10 |
9.40 |

How many L of the **sodium hydroxide** solution would
have to be added to the acid solution of your choice?

Answer #1

Consider how to prepare a buffer solution with pH =
3.66 (using one of the weak acid/conjugate base
systems shown here) by combining 1.00 L of a
0.305-M solution of weak acid with
0.271 M sodium
hydroxide.
Weak Acid
Conjugate Base
Ka
pKa
HNO2
NO2-
4.5 x 10-4
3.35
HClO
ClO-
3.5 x 10-8
7.46
HCN
CN-
4.0 x 10-10
9.40
How many L of the sodium hydroxide solution would
have to be added to the acid solution of your...

Consider how to prepare a buffer solution with pH =
9.52 (using one of the weak acid/conjugate base
systems shown here) by combining 1.00 L of a
0.417-M solution of weak acid with
0.284 M potassium
hydroxide.
Weak Acid
Conjugate Base
Ka
pKa
HNO2
NO2-
4.5 x 10-4
3.35
HClO
ClO-
3.5 x 10-8
7.46
HCN
CN-
4.0 x 10-10
9.
How many L of the potassium hydroxide solution
would have to be added to the acid solution of your...

Prepare a buffer by acid–base reactions.
Consider how to prepare a buffer solution with pH =
9.31 (using one of the weak acid/conjugate base
systems shown here) by combining 1.00 L of a
0.316-M solution of weak acid with
0.351 M potassium hydroxide.
Weak Acid
Conjugate Base
Ka
pKa
HNO2
NO2-
4.5 x 10-4
3.35
HClO
ClO-
3.5 x 10-8
7.46
HCN
CN-
4.0 x 10-10
9.40
How many L of the potassium hydroxide solution
would have to be added...

Prepare a buffer by acid–base reactions.
Close Problem
Consider how to prepare a buffer solution with pH =
9.31 (using one of the weak acid/conjugate base
systems shown here) by combining 1.00 L of a
0.316-M solution of weak acid with
0.351 M potassium hydroxide.
Weak Acid
Conjugate Base
Ka
pKa
HNO2
NO2-
4.5 x 10-4
3.35
HClO
ClO-
3.5 x 10-8
7.46
HCN
CN-
4.0 x 10-10
9.40
How many L of the potassium hydroxide solution
would have to...

Consider how best to prepare one liter of a buffer solution with
pH = 8.09 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...

Consider how best to prepare one liter of a buffer solution with
pH = 6.55 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...

Consider how best to prepare one liter of a buffer solution with
pH = 10.92 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 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...

Consider how best to prepare one liter of a buffer solution with
pH = 11.12 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 potassium salt of the
weak acid must be combined with how many grams of
thepotassium salt of its conjugate base, to
produce 1.00 L of...

Prepare a buffer by direct addition.
Consider how best to prepare one
liter of a buffer solution with pH = 3.62 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...

Design a buffer that has a pH of 3.73 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 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 a buffer that is
1.00 M...

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