If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.
You already know Dokkio is an AI-powered assistant to organize & manage your digital files & messages. Very soon, Dokkio will support Outlook as well as One Drive. Check it out today!

mixture lab

Page history last edited by Anna 16 years ago

Mixtures: Pure Substance vs. Mixtures

Is Black Marker Really Black?

Testable Question:

Definition:

Materials:

Procedure:

Fill the plastic 400 ml beaker with water 1 cm high
With the Bic marker, write the number 1 on the left side of the paper towel. Make sure the number is 2 cm above the bottom of the paper towel
Repeat this for the remaining markers, Marks-A-Lot - 2, Crayola - 3, Sharpie - 4, Expo - 5, and Vis A Vis - 6.
Slide the paper towel into the 400 ml beaker so the bottom of the paper towel touches the water. Make sure the water never touches the numbers!!

This is what it should look like:

Results/Data Table:

	Pure Substance/ Mixture	Observation
1 - Bic	Pure Substance	The Bic just stayed black and didn't move or change.
2 - Marks -A- Lot	Pure Substance	The Marks A Lot didn't change color either.
3 - Crayola	Mixture	The Crayola changed a different color and was rising up the towel.
4 - Sharpie	Pure Substance
5 - Expo	Pure Substance
6 - Vis A Vis	Mixture	The Via A Vis changed into a rainbow pattern when the water hit the marker.

Data Analysis;
Because some smeared and others dont.

Material	Description	Pure Substance or Mixture?
Charcoal	Does not separate into different substances when melted	pure substance
Salt Water	Separates into salt and water when it is boiled	mixture
Air	Separates into different gases (nitrogen, oxygen, hydrogen)	pure substance
Aluminum	When heated aluminum does not separate into different substances	pure substance
Paper	When cut, separates into smaller pieces of paper	pure substance
Brass	Separates into different metals	mixture.