# Posts Under Category Solutions

Issues and problems about solutions (solvent and solute), density of solution, dilutions, concentration and related quantities in a solution.

## Solutions: concentration of solution 0001

A concentrated hydrochloric acid containing 35.2% percentage by mass of HCl and its density is 1.175 . Calculate:

a) The molarity and molality of the acid.

b) The volume of the concentrated acid is needed to prepare a liter of solution 2 M.

## Solutions: Osmotic pressure 0001

The osmotic pressure of a solution containing 4.6 g of solute in 0.5 L of solution is 2.36 atm at 57.2 ºF. Calculate the molecular weight of the solute.

## Solutions: Molarity (molar concentration) 0002

Dissolve 20.36 g sodium chloride in the appropriate amount of water to obtain 250 mL of volumen, what is the molarity of the solution?

## Solutions: Molarity (molar concentration) 0001

Dissolve 12 g sodium chloride and flush the solution with the line in a volumetric flask to 250 mL. Determines mass concentration in g/L and molarity of solution.

## Solutions of gases: Partial pressure 0002

Mix 3 L (P = 1.2 atm and T = 59 ºF) of a gas A with 1.75 L (P = 0.98 atm and T = 89.6 ºF) of another gas B. What is the total pressure of the mixture if the volume of container is 4 L and the temperature is 77 ºF? What is the partial pressure of A? And the partial pressure of B?

## Solutions of gases: Partial pressure 0001

What is the partial pressure of oxygen in a mixture of 25 g of hydrogen and 7 g of oxygen if its volumen is 10 L and the temperature is 20ºC?

## Solutions: Percentage by mass 0006

A commercial acid label shows that its percentage by mass is 30%. What amount of the commercial solution contains 87 g of pure acid?

## Solutions: mass concentration 0003

The label on a bottle of mineral water shows that the sodium concentration is 8 mg / L. The WHO (World Health Organization) recommends taking between 500 and 2000 mg of sodium per day. What is the volume of mineral water we drink to ingest 500 mg of sodium?

## Solutions: density 0002

The density of a wine is 0.95 g/mL and a 750 mL bottle of this wine has a mass of 1170 g. What is the bottle’s glass mass?

## Solutions: Percentage by volumen 0004

50 mL of toluene are mixed with 34 g of acetone. Determine the percentage by volumen of the solute and the density of the mix, supposing the final volumen is 84 mL.

Data: ;

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