230_Sp10_E2_blank(1) - CHEM 230 Sp 10 Exam 2 p1 Name:_ 1) A...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 230 Sp 10 Exam 2 p1 Name:__________________________ a) T b = o C b) vapor pressure torr c) osmotic pressure atm 1) A molecular solute (MW = 180.16) is added to water. The resulting solution has a freezing point of -4.1 o C and a density of 1.07 g/mL. k f H2O = 1.86 (K kg)/mol; k b H2O = 0.51 (K kg)/mol; vapor pressure of water @293K = 17.54 torr a) ( 4pts ) What is the boiling point of the solution? b) ( 8pts ) What is the vapor pressure of the solution (in torr) @293K? c) ( 8pts ) What is the osmotic pressure of the solution (in atm) @ 293K?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CHEM 230 Sp 10 Exam 2 p2 Name:__________________________ 2) Ed showed you a demo of the following equilibrium in class. CoCl 4 2- (aq) Co +2 (aq) + 4Cl - (aq) c) ( 4pts ) CoCl 4 2- (aq) is a blue complex. Co +2 (aq) forms a pink complex. (Chloride is colorless.) When Ed cooled down the blue solution, it turned pink. Is the Δ H of the reaction greater than, equal to, or less than 0? ( Circle one.) Δ H > 0 H= 0 H <0 d) ( 4pts ) When Ed added HCl which direction did the equilibrium shift? ( Circle one ) towards the reactants towards the products a) ( 2 pts ) One of the stresses that he put on the system was the addition of water. According to the chemical equation above, which direction did the equilibrium shift when water was added? ( Circle one ) towards the products towards the reactants b) ( 4pts ) Explain why the equilibrium shifted in that direction upon addition of water.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

230_Sp10_E2_blank(1) - CHEM 230 Sp 10 Exam 2 p1 Name:_ 1) A...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online