Final Certification for CHEM 1212 Exam 2 Q&A

Final Certification for CHEM 1212 Exam 2 Q&A What is Molarity and the units for molarity? - CORRECT ANSWER-M=moles of solute/liters of solution, units are mol/liter What is Molality and the units for molality? - CORRECT ANSWER-m= moles of solute/moles of solvent, units are mol/kg What is Mass Percentage or Weight Percent and the units for mass percentage or weight percent? - CORRECT ANSWER-Mass %= (mass of solute/total mass of solution) x 100 What is Mole Fraction and the units for mole fraction? - CORRECT ANSWER-X1= moles of component 1/total moles of mixture, has no units ______ varies with temperature because volume is temperature dependent, ______ doesn't vary with temperature because moles and mass are unaffected - CORRECT ANSWER-Molarity, molality What is parts per million? - CORRECT ANSWER-PPM= (mass of solute/mass of solution) x 10^6 What is parts per billion? - CORRECT ANSWER-PPB= (mass of solute/mass of solution) x 10^9 Colligative properties are properties that depend only on the _________ of solute particles in solution (concentration) and not on the ______/_________ of the solute particles - CORRECT ANSWER-Quantity, kind/identity What are the 4 parts of colligative properties? - CORRECT ANSWER-1.) lowering vapor pressure 2.) lowering freezing point 3.) raising boiling point 4.) osmosis/osmotic pressure Nature of Colligative Properties: Each property involves an _______ process in which the _____ must cross a ________. - CORRECT ANSWER-Equilibrium, solvent, boundary Nature of Colligative Properties: ______ blocks the surface of the boundary preventing some of the ________ from crossing - CORRECT ANSWER-Solute, solvent