Chp2_solnsize

Chp2_solnsize - What Size is the Right Size? Today in...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
What Size is the Right Size? Today in class, we examined practice example 2.6 with a 0.30 mass fraction of H2SO4(aq) whose density was given as 1.218 g/ml. Route: Mass fraction (given concentration unit): O H mass SO H mass SO H mass 2 4 2 4 2 30 . 0 + = We assumed 1L of solution and used density to convert 1L to 1.218e3 grams. We then determine that the solution is composed of 365.4g H2SO4 and 852.6 g H2O. Convert these to mols to obtain 3.73 mols H2SO4 and 47.4 mols H2O Calculate a mol fraction of H2SO4 = 0.073 or a 7.3 mol percent. Another “convenient” sized sample would be 100g. Why? If the mass fraction is 30%
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online