Question

B. Commercial nitric acid comes in a concentration of 16.0 mol/L. The density of this solution is 1.42 g/mL
Calculate the percent (w/w) of nitric acid, HNO3, in this solution.
How many milliliters of the concentrated acid have to be taken to prepared 250 g of a solution that is 10.0%(w/w) HNO3?

  
C. Citric acid, H3C6H5O7, occurs in plants. Lemons contain 5% to 8% citric acid by mass. The acid is added to beverages and candy. An aqueous solution is 0.688 m citric acid. The density is 1.049 g/mL. What is the molar concentration?.


D. The solubility of CO2 in water is 0.161 g/100 mL at 20oC and a partial pressure of CO2 of 760 mmHg. What partial pressure of CO2 is necessary in a soft drink canning process in order to allow the solubility of CO2 to equal 0.886 g/100 mL?

  

E. What is the vapor pressure at 23 oC of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6?. The vapor pressure of pure benzene at 23 oC is 86.0 mm Hg; the vapor pressure of naphthalene can be neglected. Calculate the vapor-pressure lowering of the solution.

Answer 1