Chapter 9 Flashcards

1
Q

Solvation

A

Breaking of intermolecular forces between solute particles and between solvent particles with formation of intermolecular forces between.
Aqueous solution: water = solvent

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2
Q

Solubility

A

Amount of solute contained in solvent
Increase for solids: increase temperature
Increase for gases: decreasing temperature or increasing partial pressure of gas above solvent

Always soluble: Group I metals, ammonium, nitrate, acetate salts

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3
Q

Saturation

A

Maximum solubility of a compound at given temperature
* Can’t dissolve any more of solute just by adding more at current temperature

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4
Q

Molality

A

Mols solute/kg of solvent

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5
Q

Molarity

A

moles solute/L of solution

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6
Q

Normality

A

number of equivalents/L of solution

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7
Q

Dilution Formula

A

MiVi = MfVf

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8
Q

Mole Fraction

A

X = moles/total moles of all species

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9
Q

Percent Composition

A

mass of solute/mass of solution

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10
Q

Solubility Product Constant

A
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11
Q

Ion Product

A
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12
Q

Solution Behavior

A

Greater than solution Ksp -> precipitation
Less than solution Ksp -> dissolution

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13
Q

Colligative Properties

A

Properties that depend on the amount of solute present but not the identity of solute particles
Examples: vampor pressure depression, boiling point elevation, freezing point depression, osmotic pressure

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14
Q

Molarity (M) & Molality (m) in Water

A
  • Nearly equal at room temperature
  • Because 1 L solution = 1 kg solvent for dilute solutions
  • In other solvents vary significantly because densities aren’t 1 g/mL like water
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15
Q

Raoult’s Law (Vapor Pressure Depression)

A

Ideal solution behaviour is observed when solute-solute, solvent-solvent, and solute-solvent interactions are all very similar

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16
Q

Boiling Point Depression

A
17
Q

Freezing Point Depression

A
18
Q

Melting Point Depression

A
  • Occurs with solute addition
  • Solute interferes with lattice formation