The mass of a 132 by mass solution is 872 g the

This preview shows page 5 - 8 out of 35 pages.

1.The mass of a 13.2% (by mass) solution is 8.72 g.The density of the solution is 1.984g/mL. What is the mass of the water in this solution?A)10 gB)2.28 gC)7.57 gD)15 gE)0.00757 kg
2.The volume of a 24.0% (by mass) solution is 68.4 mL.The density of the solution is 1.552g/mL. What is the mass of the solution?
3.What mass of a 31.0% by mass glucose, C6H12O6, solution contains 50.0 g of glucose?
4.What is the percent Na2CO3by mass in a 1.56 molal aqueous solution?
5.What is the molality of a 10.0% by mass hydrochloric acid solution?The density of thesolution is 1.0474 g/mL.A)3.05mB)2.87mC)0.0105mD)0.100mE)2.64m
UNIT-10GASES AND SOLUBILITYNon-polar gases are usually not soluble in water. Most of the gases such as CO2, O2, N2and H2are not soluble in water because they are non-polar molecules. However, certain amount of thesegas molecules is soluble in water mainly because of dispersion and polar-induced dipoleinteractions between non-polar gas and polar water molecules. Byreducingthe temperature, it ispossible to increase the solubility of gas molecules in polar solvents. Also, byincreasingthepressure in closed containers, it is also possible toforcethe gas molecules toget dissolvedinwater. It should be remembered that the reduced temperature or increased pressure are temporaryconditions to improve the solubility. Once we remove these artificial conditions, the gas moleculeswill slowly evaporate from polar solvent. The carbonated soda is an ideal example where CO2isforced to dissolve in water by reducing temperature and increasing the pressure.CTQ-1:List all possible intermolecular interactions in carbonated soda that has only CO2andH2O.Effect of Temperature and Pressure on Solibility:Henry’s law:William Henry in 1803 proposed that the solubility of a gas in a solvent is directlyproportional to the partial pressure of the gas in contact with the solution. We can write this as:S = k. PwhereSis solubility,kis the proportionality constant andPis partial pressure above the gas.The Henry’s constant (k) is characteristic for any particular gas as it interacts with pure water.Somevalues forkHfor gases dissolved in water at 298 K include:Oxygen(O2) : 769.2L·atm/mol;Carbon dioxide(CO2) : 29.41 L·atm/mol;Hydrogen(H2) : 1282.1 L·atm/molHenry’s constant is written in two versions of units.1.(L.atm)/molk= P/S2.Mol/(L.atm)k = S/P

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 35 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
DARKUSJENKINS
Tags
Rate equation

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture