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Solutions
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Ionic substances readily dissociate (split apart) in water.
The positive and negative ions become attracted to
individual polar water molecules
Salt dissolving
Ionic equation for salt dissolving in water: NaCl -> Na+ +
ClIonic equation for MgCl2 dissolving in water:
MgCl2 -> Mg+2 + 2Cl-
Solutions
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An electrolyte is a substance, when dissolved in water,
conducts electricity
A strong electrolyte is a solute that produces many ions in
water (sodium chloride)
A weak electrolyte is a solute that produces only a few ions
in water
A non-electrolyte does not dissociate into ions in water and
does not conduct electricity (sucrose)
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Good electrolytes
 Ionic compounds (salts)
 Acids (HCl: hydrochloric acid)
 Bases (NaOH: sodium hydroxide)
Weak and non-electrolytes
 Covalent compounds
 Water
 Most carbon compounds (Sugars, fats, alcohols)