A solution consists of 44.3 g ofhydrochloric acid (HCl),75.7 g water, and has a volume of101 mL.
Calculate the weight percent of HCl, the molalityof HCl, the mole fraction of HCl,and the molarity of HCl in the solution.
| weight percent = | % |
| molality = | m |
| mole fraction = | |
| molarity = | M |
A solution of barium chloride(BaCl2) in water is5.000 % barium chloride by mass.Its density is 1.0434 g cm-3 at 20 °C.Compute its molarity, mole fraction, and molality at thistemperature.
Molarity BaCl2 =Â Â
Mole fraction BaCl2 =
Molality BaCl2 =Â Â
The EPA's secondary standards for contaminants that may causecosmetic or aesthetic effects in drinking water suggest an upperlimit of 5.00×10-2 mg/L formanganese . If1.40×104 liters of water in a storagetank contains 2.66 grams of Mn,what is the contaminant level in ppm? Is this level acceptablebased on EPA guidelines?
ppm   _________acceptable/not acceptable
