Homogeneous Mixtures
Identifying Parts of Homogeneous Mixtures
Introduction
Saftey Procedures and Equipment
-Safety goggles: When dealing with heat, liquids, or gasses you must always wear safety goggles to protect your eyes. When observing the hot liquid, keep distance to where it is not possible from burning yourself. Have your safety goggles on at all times.
-Hot plate: When dealing with a hot plate, you must always be cautious of your actions. No horse playing is allowed at anytime. You must take all precautions to keep from burning yourself.
-Glass: When dealing with glass, you always want to handle the equipment with extra care. If the glass is broken, tell the teacher immediately and always throw away the glass into a separate broken glass container.Materials
-Sand
-Salt
-2 Beakers
-Hand Lens
-Water
-Funnel
-Filter Paper
-Stirring Rod
-Safety Goggles
-Hot Plate
-Evaporating dish
-Tongs
Procedures
Plug in the hot plate, and set the dial to level eight, and continue with the procedures as it heats up
On one half of a piece of filter paper, place a scoop of salt
On the other half of the same filter paper, place a scoop of sand
Observe both the salt and the sand using the hand held lens
Pour both the salt and sand into an empty beaker
Add 50 mL of water into that same beaker
Using the stirring rod, gently stir all the sand, salt and water together
Observe the mixture
Fold the filter paper and place it inside the funnel
Place the filter and the funnel over the beaker that is still empty
Pour the mixture into the funnel, so that the mixture filters through into the beaker
Observe the filter paper
Place ten drops of the filtered mixture from the beaker onto the evaporating dish
Using tongs, place the evaporating dish on the hot plate and let the liquid water vaporize
Observe whether there is anything remaining on the evaporating dish
- Turn off the hot plate, being sure to be careful while it cools down