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Flashcards in In Class Exam 1 Deck (11)
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1
Q

Predict Values for: Polar Solute, Polar Solvent

∆H1
∆H2
∆H3
∆Hsoln
Outcome

A

Predict Values for: Polar Solute, Polar Solvent

∆H1 - large
∆H2 - large
∆H3 - large, negative
∆Hsoln - small
Outcome - solution forms

2
Q

Predict Values for: Nonpolar Solute, Polar Solvent

∆H1
∆H2
∆H3
∆Hsoln
Outcome

A

Predict Values for: Nonpolar Solute, Polar Solvent

∆H1 - small
∆H2 - large
∆H3 - small
∆Hsoln - large, positive
Outcome - no solution forms

3
Q

Predict Values for: Nonpolar Solute, Nonpolar Solvent

∆H1
∆H2
∆H3
∆Hsoln
Outcome

A

Predict Values for: Nonolar Solute, Nonolar Solvent

∆H1 - small
∆H2 - small
∆H3 - small
∆Hsoln - small
Outcome - solution forms

4
Q

Predict Values for: Polar Solute, Nonolar Solvent

∆H1
∆H2
∆H3
∆Hsoln
Outcome

A

Predict Values for: Polar Solute, Polar Solvent

∆H1 - large
∆H2 - small
∆H3 - small
∆Hsoln - large, positive
Outcome - no solution forms

5
Q

Pressure has ____ affect on solubilty of solids and liquids.

A

little

6
Q

Henry’s Law equation:

A

C=kP
C=concentration of dissolved gas
k=constant
P=partial pressure of gas solute above the solution

7
Q

Amount of gas dissolved in a solution is ______ proportional to the pressure of gas above the solution.

A

directly

8
Q

Solubilty of a gas in solvent typically (increases/decreases) with increasing temperature.

A

decreases

9
Q

Define volatile:

A

tendency of a substance to vaporize.

10
Q

Nonvolatile solute _______ the vapor pressure of a solvent.

A

lowers

11
Q

Raoult’s Law Equation:

A

Psoln=Xsolvsolv

Psoln = observed vapor pressure of solution

Xsolv = mol fraction of solvent

solv = vapor pressure of pure solvent