Homework Help: Chemistry

Posted by melissa on Wednesday, January 20, 2010 at 7:46pm.

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?

Chemistry - DrBob222, Wednesday, January 20, 2010 at 8:55pm
I would approach the problem this way.
You know P_solvent = X_{solvent</sub*P^o_solvent. This allows you to determine X_solvent. Now you have X for solvent and X for CaCl2. Convert those to grams and to mass percent.

Can you take it from here?}

Answer this Question

Related Questions

vapor and osmotic pressure - A solution of the sugar mannitol ( molar mass 182.2...
Physical Chemistry HELP!!!!! - A solution of the sugar mannitol ( molar mass 182...
Chemistry 2 - An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor...
Chemistry - Which of the following statements is (are) true? A. The vapor ...
Chemistry - How would you prepare 500.0 of an aqueous solution of glycerol with ...
chemistry - vapor pressure - the vapor pressure of pure water at 25C is 23.8 ...
Chemistry!!!~!! - A solution of sodium chloride in water has a vapor pressure of...
Chemistry - A solution of NaCl in water has a vapor pressure of 18.1 torr at 25 ...
Chem again sorry - A solution of sodium chloride in water has a vapor pressure ...
Physical chemistry - Estimate the vapor pressure of sea water at 20C given that ...

For Further Reading

First Name:
School Subject:
Answer: