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DAT GC > Chemical Solutions > Flashcards

Chemical Solutions Flashcards

1
Q

Molarity equation

A

Mol / L (volume)

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2
Q

Molality equation

A

Mol / Kg (solvent)

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3
Q

What is ALWAYS soluble?

A

NAG SAG
Nitrates (NO3-)
Ammonium (NH4+)
Group 1
Sulfates (SO4 2-)
Acetates (C2H3O2-)
Group 17 (Halogens ClO4-)

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4
Q

What is NOT soluble?

A

PMS and CaStro Bear
Pb2+, PO43-
Mercury (Hg2+)
Silver (Ag+)

Ca2+, Sr2+, OH-, Ba2+
CO32-, S2-

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5
Q

Solids are typically more ______ at _____ temperatures

A

soluble
high

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6
Q

Gases are more _____ at _____ temperatures

A

soluble
low

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7
Q

Gases are more _____ at _____ pressures

A

soluble
high

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8
Q

Freezing pt. for water is what

A

0 Celcius

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9
Q

Freezing pt. of water

A

1.86

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10
Q

Boiling pt of water

A

0.52

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11
Q

Van Hoff Trend with respect to osmotic pressure?

A

The higher the van hoff’t number, the higher the osmotic pressure will be

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12
Q

Evaporation of solvent will ______ the concentration of a solution.

A

increase

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13
Q

Raoults Law

A

(MolFract.a)(VPa) + (MolFract.b)(VPb)

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14
Q

What bonds are polar?

A

OH
Carbonyl
C-Halogen

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15
Q

Ammonium

A

NH4+

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16
Q

Acetate

A

CH3COO-

17
Q

Cyanide

A

CN-

18
Q

Nitrate

A

NO3-

19
Q

Phosphate

A

PO4 3-

20
Q

Sulfate

A

SO4 2-

21
Q

Carbonate

A

CO3 2-

22
Q

Hydroxide

A

-OH

23
Q

Permanganate

A

MnO4-

24
Q

The _____ point of a solution will always be higher than the boiling point of _____ solvents.

A

boiling, pure

25
Q

Van Hoff’t Equation

A

change in BP= (i)(BP constant)(molality)

26
Q

Gases are more soluble at what temps?

A

LOW temps

27
Q

Gases are more soluble at what pressures?

A

HIGH pressures

28
Q

Mol Fraction

A

Mol of X/Mols of X+everything else

29
Q

Freezing pt. depression equation

A

ΔTf= - (Kf x m x i)

30
Q

The _____ point of a solution will always be lower than the pure solvent (water).

A

freezing

31
Q

increased BP means increased

A

Molecular weight

DAT GC (6 decks)

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