A solution consists of 60.3 g of potassium bromide, KBr, and 120.7 g water. (a) Calculate the weight percent, the molality, and the mole fraction of KBr in the solution. weight percent= molality= mole fraction= molarity = % (b) The solution volume is 140 mL. Calculate the molarity of KBr in the solution. M E

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Use ppm and ppb concentration units
The EPA's secondary standards for contaminants that may cause cosmetic or aesthetic effects in drinking watelsuggest an upper limit of 0.200 mg/L for
aluminum. If 1.51x10 liters of water in a storage tank contains 1.77 grams of Al, what is the contaminant level in ppm? in ppb? Is this level acceptable
based on EPA guidelines?
ppm
ppb
Transcribed Image Text:Use ppm and ppb concentration units The EPA's secondary standards for contaminants that may cause cosmetic or aesthetic effects in drinking watelsuggest an upper limit of 0.200 mg/L for aluminum. If 1.51x10 liters of water in a storage tank contains 1.77 grams of Al, what is the contaminant level in ppm? in ppb? Is this level acceptable based on EPA guidelines? ppm ppb
Calculate solution concentration.
A solution consists of 60.3 g of potassium bromide, KBr, and 120.7 g water.
(a) Calculate the weight percent, the molality, and the mole fraction of KBr in the solution.
weight percent
molality=
mole fraction =
molarity =
%
(b) The solution volume is 140 mL. Calculate the molarity of KBr in the solution.
M
m
Transcribed Image Text:Calculate solution concentration. A solution consists of 60.3 g of potassium bromide, KBr, and 120.7 g water. (a) Calculate the weight percent, the molality, and the mole fraction of KBr in the solution. weight percent molality= mole fraction = molarity = % (b) The solution volume is 140 mL. Calculate the molarity of KBr in the solution. M m
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