An aqueous CaCl2 solution has a vapor pressure of 81.0mmHg at 50 ∘C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? An aqueous CaCl2 solution has a vapor pressure of 83.5 mmHg at 50 C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? Please provide formula used and some details. Thanks.

You are watching: What is the concentration of cacl2 in mass percent?

Answer:83.5 = 92.6 X X = moles fraction water =0.902 = moles water / moles water + moles CaCl2 1 - 0.902 = 0.098 = moles CaCl2 / moles CaCl2 + moles water

An aqueous CaCl2 solution has a vapor pressure of 84.0 mmHg at 50 degrees C. The vapor pressure of pure H2O at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
Answer:p(total) = 176.6 mmHg x(water) = 84/176.6 = 0.48 x(cacl2) = 1-0.48 = 0.52 n(water) = n(total)*x(water) n(cacl2) = n(total)*x(cacl2) %mass(cacl2) = 100 * (mass(cacl2)/mass(total)) mass(cacl2)= n(cacl2)*M(cacl2) mass(water)=n(water)*M(water) mass(total)=m(water)+m(cacl2) n(water)/n(cacl2)= 0.92 m(w)/m(cacl2) = 0.92 * (18/111) =0.15 m(w) = 0.15*m(cacl2) m(total) = 0.15cacl2 + cacl2 = 1.15cacl2 (1/1.15)*100 = %86.96 An aqueous CaCl2 solution has a vapor pressure of 82.2 mmHg at 50 degrees C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
Answer:From Raoult's law:Vapor pressure of solution = mole fraction of water x vapor pressure of watermole fraction of water = 82.2/92.6 = 0.8877mole fraction of Ca2+ and Cl- ions = 1 - 0.8877 = 0.1123For every 0.8877 moles of water, there are 0.1123/3 = 0.03743 moles of CaCl2 since CaCl2 => Ca2+ + 2Cl- and each CaCl2 gives 3 solute ions.Since mass = moles x molar mass,mass% CaCl2 = mass of CaCl2/(mass of CaCl2 + mass of H2O) x 100= (0.03743 x 110.98)/(0.03743 x 110.98 + 0.8877 x 18.02) x 100= 20.6%
When you like a flower, you just pluck it out.But when you love a flower, you water it daily.The one who understands this, understands life.- That's the difference between I like you and I love you.

Biology Forums - Study Force is the leading provider of online homework help for college and high school students. Get homework help and answers to your toughest questions in biology, chemistry, physics, math, calculus, engineering, accounting, English, writing help, business, humanities, and more. Master your assignments with step-by-step solutions to countless homework questions asked and answered by our members. If we don"t have your question, don’t worry. You can ask any homework question and get expert homework help in as little as two hours.

See more: Vigo County School Corporation Fbi Investigation Underway At Vigo Co

Our extensive online study community is made up of college and high school students, teachers, professors, parents and subject enthusiasts who contribute to our vast collection of study resources: textbook solutions, study guides, practice tests, practice problems, lecture notes, equation sheets and more. With our help, your homework will never be the same!
| Sitemaphyakkendana-hashigozake.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.