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Classifying Matter Lab Report

Classifying Matter Lab

Purpose: How can a homogeneous mixture be separated?


Hypothesis: If the color of the marker contains more than one dye, then the water will distinguish the various colors from each other. If the color of the marker contains only one dye, then the water will only show one continuous color.


Procedure: -First, cut three strips of filter paper, making each three centimeters wide and longer than the height of the cups/containers.

-Then, measure 1.5 centimeters from one end of each strip and make a small (2 or 3 mm in diameter) black dot on the first strip, a blue dot on the second strip, and a green dot on the last strip.

-After that, measure the container’s height and draw a line on the strip equal to the height starting from the end with the dot.

-By doing this, you could roll the remaining part of the strip onto a craft stick until you reach this line and attach a piece of tape to secure it.

-Finally, make sure you indicate which strip has which color dot.

-After preparing the materials, pour less than 1 centimeters of water in each of the three cups.

-Then, put each strip in each of the cups and make sure the dot isn’t soaking in the water.

-Next, remove the paper strips from the cups once the water level is about 1 centimeter from the craft stick.

-Finally, lay the strips onto a paper towel and then mark where the water line ends. Record your observations.


Materials: -Filter paper

-3 Containers/Cups

-3 Craft Sticks

-Black Marker

-Blue Marker

-Green Marker





-Centimeter Ruler


Data and Observations:


Ink Color Dye Colors Present Distance Traveled by Dye Color (Dc) Distance Traveled by Water (Dw) Retention Factor (Dc/Dw)
Black Pink 4 Cm. 10.5 Cm. 0.38
Purple 1 Cm. 0.095
Blue 2 Cm. 0.19
Blue Blue 4 Cm. 9 Cm. 0.44
Purple 2.5 Cm. 0.278
Green Green 4 Cm. 9.5 Cm. 0.42
Blue 1.5 Cm. 0.158



Answers To Questions:


1.     Q: Which ink contained the greatest number of dye colors? Which colors did it contain? A: The black ink contained the greatest number of dye colors. The colors included pink, purple, and blue.

2.     Q: Did the manufacturer use the same dye color in more than one marker? How do you know? A: Yes the manufacturer used the same dye color in more than one marker. I know because the blue dye is included in all three of the separated homogeneous mixture. It is located at the top of every mixture.

3.     Q: Compare your chart for the green ink with one other group’s chart. Did you see the same separation of colors? Did you dye colors travel the same distance? Did your dye colors have similar retention factors? A: Yes I did see the same separation of colors, which was blue and green. The dye colors traveled almost the same distance. My group’s blue dye traveled 1.5 Cm. while the other group’s blue dye traveled 2.5 Cm. On the other hand, my group’s green dye traveled 4 Cm. while the other group’s green dye traveled 5 Cm. No our dye colors did not have similar retention factors because the other group’s distance traveled by water was greater. The retention factor my group’s green dye had was 0.42 and the blue dye had 0.158. The retention factor for the other group was 0.52 for the green dye and 0.26 for the blue dye.

4.     Q: If you repeated the procedure using a 20 centimeter paper strip, would your retention factors change? Why or why not? A: Well, it would depend on the time you left the strips in the water. If I left the strips in the water for the same amount of time as mine, the retention factors would not change because it doesn’t matter how long the paper strip is, since whatever the length is the dye could only travel a limited distance. It’s not like the longer the paper, the longer the dye colors become, for the paper doesn’t affect the distance the dyes travel. Only the distance the water traveled affects the dye’s length. If I left the strips in the water for a greater amount of time, then the retention factors would change most likely because the distance the water traveled would be greater and therefore stretch out the dyes a slight bit.


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