Question

A solution is prepared by dissolving 20.2 mL of methanol in 100.0 mL of water. The final volume of this solution is 118ml. The densities of methanol and water are 0.782 g/mL and 1.00 g/mL, respectively. For this solution, calculate the following-

molarity

molality

mass %

MOLE FRACTION

VOLUME OF SOLVENT

MASS OF SOLVENT

MOLES OF SOLVENT

VOLUME OF SOLUTE

MOLES OF SOLUTE

MASS OF SOLUTE

VOLUME OF SOLUTION

MASS OF SOLUTION

Answer #1

A solution is prepared by dissolving 20.2 mL of methanol (CH3OH)
in 100.0 mL of water at 25 ∘C. The final volume of the solution is
118 mL. The densities of methanol and water at this temperature are
0.782 g/mL and 1.00 g/mL, respectively. For this solution,
calculate each of the following.
A. Molarity
B. Molality
C. Percent by Mass
D. Mole fraction

A solution is prepared by dissolving 61.5 mL of methanol in
115.0 mL of water at 25 ∘C . The final volume of the solution is
173.4 mL . The densities of methanol and water at this temperature
are 0.782 g/mL and 1.00 g/mL , respectively. For this solution,
calculate each of the following. [Molarity, molality, mass
percent]

A)
A solution is prepared by dissolving 50.4 g sucrose (C12H22O11) in
0.332 kg of water. The final volume of the solution is 355 mL. For
this solution, calculate the molarity. Express the molarity
in units of moles per liter to three significant
figures.
B)
Calculate the molality. Express the molality in units of
moles per kilogram of solvent to three significant
figures.
C)
Calculate the percent by mass.Express the percent by
mass to three significant figures.
D)
Calculate the...

A solution was prepared by
dissolving 26.0 g of KCl in 225 g of water.
The composition of a solution can be expressed in several
different ways. Four of the most common concentration units are
defined as follows:. mass %=mass of
componenttotal mass of solution×100%; mole fraction (X)=moles of
componenttotal moles of solution; molarity (M)=moles of
soluteliters of solution; molality (m)=moles of
solutemass of solvent (kg)
Part A
Calculate the mass percent of KCl in the solution.
Part B
Calculate...

Determine the molality of a solution of ethanol dissolved in
methanol for which the mole fraction of ethanol is 0.397. Give your
answer to 2 decimal places
Calculate the boiling point (in degrees C) of a solution made by
dissolving 6.81 g of sucrose (C12H22O11) in 99.7 g of acetone. The
Kbp of the solvent is 1.71 K/m and the normal boiling point is 56.2
degrees C. Give your answer to 2 decimal places
When 11.8 g of an unknown,...

A solution is prepared by dissolving 29.0 g of glucose (C6H12O6)
in 360 g of water. The final volume of the solution is 382 mL . For
this solution, calculate each of the following.
A. Mole Fraction
B. Mole Percent

± Introduction to Units of Concentration
The composition of a solution can be expressed in several different
ways. Four of the most common concentration units are defined as
follows:.
mass %=mass of componenttotal mass of solution×100%
mole fraction (X)=moles of componenttotal moles of
solution
molarity (M)=moles of soluteliters of solution
molality (m)=moles of solutemass of solvent (kg)
A solution was prepared by dissolving 33.0 g of KCl in 225 g of
water.
Part A
Calculate the mass percent of KCl...

A 2.450×10−2M 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 solution is prepared by dissolving 13.63 g of sucrose
(C12H22O11) in 612 g of water. The final volume of the solution is
635 mL.
For this solution, calculated the concentration in each unit
indicated below.
a.Molarity
b.Molality
c.Mole fraction of glucose

A standard solution is prepared for the analysis of
fluoxymesterone (C20H29FO3), an anabolic steroid.
A stock solution is first prepared by dissolving 10.0 mg of
fluoxymesterone in enough water to give a total volume of 500.0
ml.
A 100.0 μL aliquot (portion) of this solution is diluted to a
final volume of 100.0 ml.
Calculate the concentration of the final solution in terms of
molarity

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