Colloids share many properties with solutions.
If you can see chunks or settling, it’s a suspension, not a colloid
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particles of a colloid are typically smaller than those of a suspension
The smaller the particle size, the more stable the mixture.
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For a solution with a nonvolatile solute dissolved in a volatile solvent the vapor pressure is due to the solvent
the vapor pressure of a solution equals the mole fraction of solvent times the vapor pressure of the pure solvent, so adding a nonvolatile solute lowers vapor pressure.
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