Solution, Suspensions and Colloids

1. Solution, Suspensions and Colloids Mixtures

2. Demo • Write down your observations & notes

3. Solution

4. Solutions – soluble mixtures • Homogenous mixture • Small particle size, invisible to the naked eye • Salt water, sugar water

5. Demo • Write down your observations & notes

6. Colloid

7. Colloids: floating insoluble mixtures • Medium sized particles held together by Brownian motion (erratic motion of particles bumping into one another) • Milk, paint, fog, honey, smoke, ink, gum, gelatin, marshmallows, butter, cosmetics, shampoos, oil and water with soap (emulsifier) • Tyndall Effect – Light scattered due to Brownian motion

9. Tyndall Effect

11. Demo • Write down your observations & notes

12. Suspension

13. Suspensions – sinking insoluble mixtures • Mixtures that contain particles that settle out if left undisturbed. • Particles > 10-6m • Can be filtered • Blood, aerosols, cornstarch and water, Italian salad dressing,

15. This is raw milk – straight from the cow Cream Layer Milk layer

16. In summary

18. The difference is…..