Question

1.) .9720 M aqueous solution of NaCl has a density of 1.03625g/cm^3 at 25 C, Calculate the molality of the solution. ( you will also need the density of pure water at the 25C which equals .997044 g/cm^3)

2.) Calculate the apparent molar volume of the above solution.

3.) What quantities will be obtained in a plot of apparent molar volume vs the square root of the molality?

4.) How will these quantities be used to determine the partial volume of the aqueous NaCl solution.

Answer #1

An aqueous solution is 0.182 M NaCl and at 25 C has a density of
1.062 g mL -1. The observed osmotic pressure of the solution is
8.456 atm at 25 C. What fraction of NaCl exists as ion pairs in
this solution?

A 2.250×10^−2 M solution of NaCl in water is at 20.0∘C. The
sample was created by dissolving a sample of NaCl in water and then
bringing the volume up to 1.000 L. It was determined that the
volume of water needed to do this was 999.4 mL . The density of
water at 20.0∘C is 0.9982 g/mL.
a. Calculate the molality of the salt solution.
b. Calculate the mole fraction of salt in this solution.
c. Calculate the concentration of...

A 2.650×10?2 M solution of NaCl in water is at 20.0?C. The
sample was created by dissolving a sample of NaCl in water and then
bringing the volume up to 1.000 L. It was determined that the
volume of water needed to do this was 999.3 mL . The density of
water at 20.0?C is 0.9982 g/mL. Part A. Calculate the molality of
the salt solution. Part B.Calculate the mole fraction of salt in
this solution Part C Calculate the...

A.) A solution of H2SO4(aq) with a molal concentration of 3.58 m
has a density of 1.200 g/mL. What is the molar concentration of
this solution?
B.) What is the mole fraction of solute in a 3.79 m aqueous
solution?
C.) An aqueous sodium acetate, NaC2H3O2, solution is made by
dissolving 0.155 moles of NaC2H3O2 in 0.650 kg of water. Calculate
the molality of the solution.

1. The density at 20 ∘C of a 0.258 m solution of glucose in
water is 1.0173 g/mL, and the molar mass of glucose is 180.2 g/mol.
What is the molarity of the solution?
2. Household bleach is a 3.0 mass % aqueous solution of sodium
hypochlorite, NaOCl.
3.
A. What is the molality of the bleach? (Express your answer
using two significant figures.)
B. What is the mole fraction of NaOCl in the bleach? (Express
your answer using two...

A 2.100×10−2 M solution of NaCl in water is at 20.0∘C. The
sample was created by dissolving a sample of NaCl in water and then
bringing the volume up to 1.000 L. It was determined that the
volume of water needed to do this was 999.4 mL . The density of
water at 20.0∘C is 0.9982 g/mL.
Part A
Calculate the molality of the salt solution.
Express your answer to four significant figures and include the
appropriate units.
Part B...

3. An aqueous solution of 3.63 M glycerol,
C3H5(OH)3, has a density of 1.185
g/mol.
a) Calculate molar concentration of the solution.
b) Find the weight percent of glycerol in the solution.
c) What is the mole fraction of glycerol in the solution?

A chemist must prepare
275.mL
of
1.00
M aqueous sodium chloride
NaCl
working solution. He'll do this by pouring out some
4.71molL
aqueous sodium chloride stock solution into a graduated cylinder
and diluting it with distilled water.
Calculate the volume in
mL
of the sodium chloride stock solution that the chemist should
pour out. Round your answer to
3
significant digits.

1.) Indicate which aqueous solution has the lowest vapor
pressure:
a. 0.2 M MgCl2 b. 0.1 M
MgCl2 c. 0.2 M NaCl d. 0.1
M KCl e. 0.1 M Na2CO3
2.) Indicate which aqueous solution has the fastest evaporation
rate.
a. 0.2 M MgCl2 b. 0.1 M
MgCl2 c. 0.2 M NaCl d. 0.1
M KCl e. 0.1 M Na2CO3
3.) What is the molarity of a sucrose
(C12H22O11) solution that produces
an osmotic pressure of 2.65 atm at 25°C?...

1. An aqueous solution of sulfuric acid (6M H2SO4 in water) is
flowing into a tank at the
rate of 100 liters/min (also can be written 100 L/min) having a
density of 1.34 g/cm3.
Calculate value of the items requested below and make sure you
show HOW you
obtained them.
For parts (b) - (d), first write out the equation using symbols
for the appropriate variables,
and then algebraically solve for the unknown variables, and
finally substitute in the
numerical...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 4 minutes ago

asked 25 minutes ago

asked 26 minutes ago

asked 35 minutes ago

asked 36 minutes ago

asked 51 minutes ago

asked 53 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago