Question

**Part A**

Calculate the mass percent (m/m) of a solution prepared by dissolving 52.18 g of NaCl in 152.8 g of H2O.

Express your answer to four significant figures.

Part B Vinegar is a solution of acetic acid in water. If a 185 mL bottle of distilled vinegar contains 26.5 mL of acetic acid, what is the volume percent (v/v) of the solution? Express your answer to three significant figures. Part C Calculate the mass/volume percent (m/v) of 24.0 g NaCl in 46.0 mL of solution. Express your answer to three significant figures. Part D Calculate the molarity (M) of 150.6 g of H2SO4 in 1.070 L of solution. Express your answer to four significant figures. |

Answer #1

**A) Calculate the mass percent (m/m) of a solution
prepared by dissolving 52.18 g of NaCl in 152.8 g of
H2O.**

% mm = mass of solute / total mas * 100%

mass of solute = 52.18 g

total mass = 52.18 + 152.8 = 204.98 g

then

% m/m = 52.18/204.98*100 = 25.456 %

B)

Vinegar is a solution of acetic acid in water. If a 185 mL bottle of distilled vinegar contains 26.5 mL of acetic acid, what is the volume percent (v/v) of the solution?

Vsolute = 26.5 mL

Vsolvent= 185 mL

Vtotal = 26.5+185 = 211.5 mL

now...

% v/v = vsolute / total V * 100% = 26.5 /211.5 *100 = 12.529 %

C)

Calculate the mass/volume percent (m/v) of 24.0 g NaCl in 46.0 mL of solution.

% m/v = mass of solute / total v * 100%

% m/v = 24 / 46.0* 100%

%m/v = 52.1739 %

D) Calculate the molarity (M) of 150.6 g of H2SO4 in 1.070 L of solution.

M = mol of solute / V solution

mol = mass/MW = 150.6/98 = 1.5367 mol

M = 1.5367 /1.070

M = 1.436

An aqueous NaCl solution is made using 111 g of NaCl diluted to
a total solution volume of 1.10 L . Part A Calculate the molarity
of the solution. Express your answer using three significant
figures. Part B Calculate the molality of the solution. (Assume a
density of 1.08 g/mL for the solution.) Express your answer using
two significant figures. Part C Calculate the mass percent of the
solution. (Assume a density of 1.08 g/mL for the solution.) Express
your...

Calculate the mass percent, % (m/m), for the solute in each of
the following solutions.
Part A
24 g of KCl and 100 g of H2O
Express your answer using two significant figures.
Part B
11 g of sugar in 200 g of tea with sugar (solution)
Express your answer using two significant figures.
Part C
6.0 g of CaCl2 in 65.0 g of CaCl2 solution
Express your answer using two significant figures.

Part A Calculate the molarity of a solution prepared by
dissolving 12.9 g of Na2CrO4 in enough water to produce a solution
with a volume of 670. mL .
Express the molarity to three significant digits
Part B
How many moles of KBr are present in 160. mL of a 0.127 M
solution?
Express the amount in moles to three significant digits
Part C
How many milliliters of 6.7 M HCl solution are needed to obtain
0.19 mol of HCl?...

Part A
What is the mass percent of NaOH in a solution of 1.74 g NaOH in
165 g of water.
Express the mass percent to three significant figures.
Part B
What is the mass percent of ethanol in a solution of 7.80 mL of
ethanol (density = 0.789 g/mL) in 75.0 g of water?
Express the mass percent to three significant figures.

Calculate the mass percent (m/m) of a solution containing 13.5 g
of Na2SO4 and 77.5 g of H2O.
Express your answer to three significant figures.

A 2.050×10−2M 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 999.4 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
Calculate...

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...

***the measured pH of vinegar is 2.5*** Part B:
Determination of Ka of Acetic Acid 3. The concentration of
distilled white vinegar is written as 5% (w/v) of acetic acid
(CH3COOH). Convert the concentration units from % (w/v) into
molarity. Express your answer in four significant figures. In other
words, assume that the concentration is 5.000% (w/v). (Hint: See
the Prelab Question 3.) 4. Calculate the concentration of hydronium
ions [H3O+] of vinegar from the measured pH values. Express your...

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...

An aqueous solution contains 4.3% NaCl by mass.
Part A
Calculate the molality of the solution.
Express your answer using two significant figures.
Part B
Calculate mole fraction of the solution.
Express your answer using two significant figures.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 6 minutes ago

asked 10 minutes ago

asked 12 minutes ago

asked 15 minutes ago

asked 18 minutes ago

asked 23 minutes ago

asked 26 minutes ago

asked 40 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago