Skip to main content
S

Sigrid O'Kon

Feb 20, 2025

Calculate the molality of the solution. (assume a density of 1.08 g/ml for the solution.)an aqueous nacl solution is made using 140

Calculate the molality of the solution. (assume a density of 1.08 g/ml for the solution.)an aqueous nacl solution is made using 140 g of nacl diluted to a total solution volume of 1.20
0
Save

3 Answers

M
molality is moles solute / kg of solvent  moles of NaCl = mass / molar mass molar mass NaCl = 58.44 g/mol moles NaCl = 140 g / 58.44 g/mol = 2.40 mol NaCl  The total volume of the solution is 1.2L or 1200 ml The density of the solution is 1.08 g/ml   Therefore the total mass of the solution is 1.08 g/ml x 1200ml = 1296 g  But there are140 g of NaCl in this solution  So mass H2O = 1296 g - 140 g = 1156 g = 1.156 kg  molality = moles solute/ kg solvent = 2.40 mol / 1.156 kg = 2.08 molal... Show More
0
M
i think it is true since you can test the answer and can use observations to complete it.... Show More
0

Want to answer this question?

Join our community to share your knowledge!

Log in Sign up

Categories

Tags

Related Questions

2
calculate the molarity of sodium ion in a solution made by mixing 3.4mL of .386 M soldium chloride with 475mL?

calculate the molarity of sodium ion in a solution made by mixing 3.4mL of .386 M sodium chloride with 475mL of .0712 M...

2
Calculate the number of grams of oxygen required to convert 43.0 g of glucose to CO2 and H2O?

Glucose, C6H12O6, is used as an energy source by the human body. The overall reaction in the body is described by the eq...

1
4
Calculate the ph of a buffer that is 0.020 m hf and 0.040 m naf. the ka for hf is 3.5 × 10-4.

Calculate the ph of a buffer that is 0.020 m hf and 0.040 m naf. the ka for hf is 3.5 × 10-4.

5
Calculate the proton’s initial kinetic energy.?

1) An infinitely long line of charge has linear charge density 5.50×10−12 C/m. A proton (mass 1.67×10−27 kg , charge 1.6...

7
Calculate the rms speed of an oxygen gas molecule, o2, at 29.0 ∘c . express your answer numerically in meters per second.

Calculate the rms speed of an oxygen gas molecule, o2, at 29.0 ∘c . express your answer numerically in meters per second...

1
2
calculate the solubility product constant for this salt?

A 1.00-L solution saturated at 25 C with calcium oxalate CaC2O4 contains 0.0061 g of CaC2O4.Calculate the solubility-pro...

1
Calculate the standard enthalpy?

CH3OH (l) + 1.5O2 (g) > CO2 (g) + 2H2O (g)Calculate the standard enthalpy change for the reaction, assuming H2O (g) as a...

1
Calculate the total mass of the neutrons in 19 9 F.

Part ACalculate the total mass of the neutrons in 19 9 F.Use 1.008665 amu as the mass of 10n (mass of a neutron).Express...