Asked by melissa
An aqueous CaCl_2 solution has a vapor pressure of 82.1mmHg at 50C. The vapor pressure of pure water at this temperature is 92.6mmHg.
What is the concentration of CaCl_2 in mass percent?
What is the concentration of CaCl_2 in mass percent?
Answers
Answered by
DrBob222
I would approach the problem this way.
You know P<sub>solvent</sub> = X<sub>solvent</sub*P<sup>o</sup><sub>solvent</sub>. This allows you to determine X<sub>solvent</sub>. Now you have X for solvent and X for CaCl2. Convert those to grams and to mass percent.
Can you take it from here?
You know P<sub>solvent</sub> = X<sub>solvent</sub*P<sup>o</sup><sub>solvent</sub>. This allows you to determine X<sub>solvent</sub>. Now you have X for solvent and X for CaCl2. Convert those to grams and to mass percent.
Can you take it from here?
Answered by
Anonymous
43.2%
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