What is the molality and molarity of solution prepared by dissolving 35.0 mL of benzene (density...

What is the molality and molarity of solution prepared by dissolving 35.0 mL of benzene (density = 0.877 g/mL) in 175 mL of hexane (density = 0.660 g/mL)? Assume volumes are additive.

Expert Solution

volume of benzene = 35 mL

mass of benzene = volume x density

= 35 x 0.877

= 30.695 g

moles of benzene = mass / molar mass = 30.695 / 78.11 = 0.393

mass of hexane = 175 x 0.660 = 115.5 g = 0.1155 kg

volume of hexane = 175 mL = 0.175 L

molality = moles of solute / mass of solvent in kg

= 0.393 / 0.1155

= 3.4 m

molality = 3.4 m

molarity = moles / volume of solution

= 0.393 / (0.035 + 0.175)

= 1.87 M

Molarity = 1.87 M

queen_honey_blossom answered 2 years ago

a) What is the molarity of the solution that was prepared by dissolving 3.25 g of...

a) What is the molarity of the solution that was prepared by dissolving 3.25 g of sulfuric acid in water to a total volume of 500.0 mL? b)What is the molarity of the hydrogen ion in part a if you assume the sulfuric acid ionizes completely? Write a balanced chemical equation.

Calculate the molarity and molality of a solution of 50 grams of ethanol, C2H5OH (density =...

Calculate the molarity and molality of a solution of 50 grams of ethanol, C2H5OH (density = 0.789 g/mL) which is dissolved in 200 mL of water (density = 1.00 g/mL). Please show all work with the correct answer. Thank you!!!

Calculate the molarity, molality and the percent by mass for a solution that has XNa2SO4=0.4501 (density=...

Calculate the molarity, molality and the percent by mass for a solution that has XNa2SO4=0.4501 (density= 1.25g/ml).

calculate the concentration of a solution prepared by dissolving 35.0 g of aluminum carbonate in enough...

calculate the concentration of a solution prepared by dissolving 35.0 g of aluminum carbonate in enough water to prepare 500.0 mL of solution

What is the molality of a solution of naphthalene in benzene if the freezing point of...

What is the molality of a solution of naphthalene in benzene if the freezing point of pure benzene is 5.5°C and the freezing point of the solution is 4.0°C. The freezing point depression constant for benzene is 5.12°C m-1.

What is the concentration in % (v/v) of a methanol solution prepared by mixing 35.0 mL...

What is the concentration in % (v/v) of a methanol solution prepared by mixing 35.0 mL of methanol with 700 mL of distilled water?

A solution with a final volume of 500 mL was prepared by dissolving 25 mL of...

A solution with a final volume of 500 mL was prepared by dissolving 25 mL of methanol {CH2OH} (density = 0.7914) in chloroform {CHCl3}. Calculate its molar concentration. (MWMethanol = 32.00) (show the solution)

A solution is prepared by dissolving 46.5 mL of methanol in 130.0 mL of water at...

A solution is prepared by dissolving 46.5 mL of methanol in 130.0 mL of water at 25 ∘C. The final volume of the solution is 169.5 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 E.)mole percent

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH3OH (d...

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH3OH (d = 0.792 g/mL) and 387 mL of CH3CH2CH2OH (d = 0.811 g/mL). I get 2.01m, but I am not sure if I am doing this right.

A solution consists of 35 ppm of benzene. The density of the solution is 1.00g/mL. How...

A solution consists of 35 ppm of benzene. The density of the solution is 1.00g/mL. How many grams of benzene are in 1 g of solution? How many grams of benzene are in 1.0 L of the solution? What is the mass percentage of benzene in the solution? Please show calculations!

Question