Question
You are asked to prepare 1.9 L of a HCN/NaCN buffer that has a pH of...
You are asked to prepare 1.9 L of a HCN/NaCN buffer that has a pH of 9.83 and an osmotic pressure of 1.12 atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN.) Answer in g. ps the answers are not 0.45,3.5
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
You are asked to prepare 1.9 L of a HCN/NaCN buffer that has a pH of...
You are asked to prepare 1.9 L of a HCN/NaCN buffer that has a
pH of 9.83 and an osmotic pressure of 1.12 atm at 298 K. What
masses of HCN and NaCN should you use to prepare the buffer?
(Assume complete dissociation of NaCN.) Express your answers using
two significant figures separated by a comma.
You have to prepare a pH 5.00 buffer, and you have the following 0.10M solutions available:...
You have to prepare a pH 5.00 buffer, and you have the following
0.10M solutions available: HCOOH, HCOONa, CH3COOH, CH3COONa, HCN,
and NaCN.
Part A
Which solutions would you use?
Check all that apply.
HCOOH
HCOONa
CH3COOH
CH3COONa
HCN
NaCN
Part B
How many milliliters of each solution would you use to make
approximately a liter of the buffer?
You are asked to prepare a KH2PO4 ā Na2HPO4 solution that has the same pH as...
You are asked to prepare a KH2PO4 ā Na2HPO4 solution that has
the same pH as human blood, 7.40.
a) What should be the ratio of concentrations of [HPO42-] /
[H2PO4-] in this buffer solution?
b) Suppose you have to prepare 1.00 L of this solution such that
it is isotonic with blood (i.e. same osmolarity as blood). What
masses of KH2PO4 and of Na2HPO4ā¢12H2O would you use? Assume all of
these salts are fully soluble in water. Blood has...
You are asked to prepare 1.2 l of a 0.05 M tris buffer at pH= 7.8....
You are asked to prepare 1.2 l of a 0.05 M tris buffer at pH=
7.8. You start with the conjugate base form of tris (121 g/mol).
How many grams of tris must you weigh out? How many ml of 6 M HCl
(a strong acid) must you add to reach pH=7.8? The pKa for tris is
8.1.
You are asked to prepare 500. mL of a 0.300 M acetate buffer at pH 4.90...
You are asked to prepare 500. mL of a 0.300 M acetate buffer at
pH 4.90 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76),
3.00 M NaOH, and water. Answer the following questions regarding
the preparation of the buffer.
1. How many grams of acetic acid will you need to prepare the
500 mL buffer? Note that the given concentration of acetate refers
to the concentration of all acetate species in solution.
You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 4.90...
You are asked to prepare 500. mL of a 0.150 M acetate buffer at
pH 4.90 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76),
3.00 M NaOH, and water. Answer the following questions regarding
the preparation of the buffer.
1. How many grams of acetic acid will you need to prepare the
500 mL buffer? Note that the given concentration of acetate refers
to the concentration of all acetate species in solution.
2. What volume of 3.00 M NaOH must...
You are asked to prepare 500. mL of a 0.300 M acetate buffer at pH 5.00...
You are asked to prepare 500. mL of a 0.300 M acetate buffer at
pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76),
3.00 M NaOH, and water. Answer the following questions regarding
the preparation of the buffer.
1. How many grams of acetic acid will you need to prepare the
500 mL buffer? Note that the given concentration of acetate refers
to the concentration of all acetate species in solution.
2. What volume of 3.00 M NaOH must...
You are asked to prepare 500. mL of a 0.300 M acetate buffer at pH 5.00...
You are asked to prepare 500. mL of a 0.300 M acetate buffer at
pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76),
3.00 M NaOH, and water. Answer the following questions regarding
the preparation of the buffer.
1. How many grams of acetic acid will you need to prepare the
500 mL buffer? Note that the given concentration of acetate refers
to the concentration of all acetate species in solution.
2. What volume of 3.00 M NaOH must...
You were asked to prepare a buffer with a pH of 9.00. Table 1: Weak Acid...
You were asked to prepare a buffer with a pH of 9.00.
Table 1:
Weak Acid
Ka
pKa
Lactic Acid
(HC3H5O3)
1.4 x 10-4
3.85
Acetic Acid
(HC2H3O2)
1.8 x 10-5
4.74
Carbonic Acid (H2CO3)
4.4 x 10-7
6.36
Dihydrogen
(H2PO4-)
6.2 x 10-8
7.21
Ammonium ion (NH4+)
5.6 x 10-10
9.25
Hydrogen Carbonate
(HCO3+)
4.7 x 10-11
10.32
A. Using Table 1, what buffer system will you use?
B. Your lab supervisor asked you to use 0.050 mol of...
You are asked to create 1L of a buffer solution that has a total of 1M...
You are asked to create 1L of a buffer solution that has a total
of 1M of phosphates. The final pH of the solution should be 7.2.
How much (in g) of each of NaH2PO4 and
Na2HPO4 should be added. The 25oC
dissociation constants are pK1=2.12,
pK2=7.21, and pK3=12.67.
Don't know how to do question, if anyone could help that would
be great.
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 17 minutes ago
asked 17 minutes ago
asked 18 minutes ago
asked 30 minutes ago
asked 34 minutes ago
asked 44 minutes ago
asked 47 minutes ago
asked 51 minutes ago
asked 54 minutes ago
asked 55 minutes ago
asked 1 hour ago
asked 1 hour ago