General Properties of Aqueous Solutions

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Section 4.1

• General Properties of Aqueous Solutions

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Solution- homogenous mixture of 2 or more
substances
Solute- substance present in the smaller amount
Solvent- substance present in the larger amount
Soft drink (l)
H2O
Sugar, CO2
Air (g)
N2
O2, Ar, CH4
Pb
Sn
Soft Solder (s)
4.1
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Electrolytic Substances

• Electrolyte produces ions, creating electrically
  conducting solution
• Ex Salt
• Nonelectrolyte not ionized and does not conduct
  electric current in water
• Ex Sugar

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Ionic Compounds in Water (Electrolytes) The
conductivity of the solution is due to the
formation of ions when the compound dissolves in
water NOT the result of a chemical reaction!
Its the result of a dissociation of the molecule
into ions
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Ionic Compounds in Water
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Strong Electrolytes
Strong electrolytes A substance which
completely ionizes in water. Example
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Weak Electrolytes
Weak electrolyte A substance which partially
ionizes when dissolved in water. Example
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Weak Electrolytes
The arrow with two heads indicates two opposing
reactions are occurring simultaneously- a state
of chemical equilibrium.
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Homework

• 4.15-4.18 on page 158