What are the differences between solution and suspension?

Basis of differentiation 

Solution 

Suspension 

Definition 

Is a homogeneous mixture comprised of very small particles

Is a heterogeneous mixture comprised of bigger particle sizes 

Composition 

Homogeneous – solute particles are dissolved in a solvent. The composition remains the same throughout the mixture

Heterogeneous - particles can be visibly distinguished. The composition does not remain the same throughout

Particle size

Particles are very small either of atomic or molecular level, average size is <1 nm

Particles are comparatively larger, average size > 1000nm    

Visibility of particles

Particles cannot be seen with the naked eye or even under a light microscope 

Particles can be seen by the naked eye as well as under a light microscope. 

Dispersion 

Particles are evenly dispersed

Particles are not evenly dispersed  

Properties 

Solutes and solvent are in the same phase

Suspended particles can be in a different phase from that of the medium

Appearance 

Transparent - no scattering of light

Cloudy - light is scattered and reflected

Examples

Salt (NaCl) in water or sugar in water

Milk of magnesia – a  suspension of magnesium hydroxide