Transcript Separating Mixtures

10-8-14
Separating Mixtures
1. Sorting
Separating mixtures with your hands.
Ex: separating pop corn kernels, black
beans, & rice
2. Using a Magnet
• Using the magnetic property of a
substance to separate a mixture
• Made of iron
Ex: Iron Filings & pencil shavings
3. Chromatography
-Separating a colored mixture by
using a solvent to see what colors
make it up.
Ex: Black marker
4. Filtration
• Separating by size
• Allowing liquids or smaller items to
pass through a filter, leaving a larger
substance on the other side.
Ex: sand & water; rocks & dirt
5. Dissolving a Substance
Mixing substances in water to
separate the one that dissolves.
Ex: Sand & Sugar
6. Evaporation/Boiling/Simple
Distillation
Separation by changing a liquid to a
gas to leave behind a dissolved
substance
Ex: lemonade
7. Fractional Distillation
Separates liquids by using their
different boiling points
Ex: water (100ᴼC) and ethanol (78ᴼC)
Sand, Salt, Iron Filings Mixture
Procedures for separation: (be very detailed)
1. Take out the iron filings with a magnet.
2. Pour the sand and salt in water
so that the salt will dissolve.
3. Use a filter to separate the salt
water from the sand.
4. Evaporate the water out of the
salt water which will leave the salt
behind.
Tuesday, October 14th
• Grab notebook
• Write HW in planner
QOD#31
How would you best
separate a large
amount of sand and
small sea shells?
(RAP)
Separating Mixtures
Questions
1. How do you separate iron filings from sand?
2. How do you separate a mixture of solids and liquids?
3. What is the technique that separates a mixture based on the
individual substance’s tendency to travel across a surface?
4. How do you separate the substances that make up a solution?
5. How do you separate a mixture of trail mix?
6. How do you separate a mixture of dirt and rocks?
7. How do you separate Easter Egg dyes?
8. What method of separation does a person use to find diamonds?
9. What method do you use to separate a lemonade mixture?
10. How would you separate a mixture of small particles of chalk and
sugar?
Separating Mixtures
Answers
1. Use a magnet to remove the iron filings.
2. Use a filter (filtration)
3. Chromatography
4. Evaporate out the liquid to the leave the other substance.
5. Sorting
6. Sorting or Filtration
7. Chromatography
8. Filtration
9. Evaporate out the water
10. First, add water to dissolve the sugar
Next, use a filter to separate the sugar water and the chalk
Lastly, evaporate the water leaving behind the sugar.