AP Chemistry / Unit 3: Properties of Substances and Mixtures
3.8 Representations of Solutions
Notes
Particle diagrams show solvent and solute. In aqueous ionic solutions, water's partial negative oxygen faces cations; partial positive hydrogens face anions.
Practice
In a diagram of $\mathrm{Na^+}$ in water, the water molecules should orient:
O is partially negative.
1 M $\mathrm{CaCl_2}$ has what concentration of $\mathrm{Cl^-}$?
Two chlorides per formula unit.
A particle diagram of a strong electrolyte shows:
It dissociates completely.
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