Solubility is an important property of matter. If a chemical is soluble in water, then the chemical will dissolve, or appear to disappear, when it's added to water—or vice versa. This is why the ink can dissolve in the drop of water on the paper and then travel along with the water through the paper. If a chemical is not soluble, also known as insoluble, then it will not dissolve. Can you think of some things that are insoluble in water?
If a piece of paper were printed with ink that was insoluble in water, what would happen when a drop of water fell on it? The ink should remain in place on the paper and would not be carried away by the water flowing through the paper.
Observations and results After water was added to the drawing, did the ink stay in place? Whereas after isopropyl alcohol was added, did the ink run and spread out, creating colorful artwork? The ink used in permanent markers does not dissolve in water, meaning the ink is water insoluble. This is why when you added drops of water to the designs you made on the T-shirt, the ink should have pretty much stayed in place. Permanent marker ink, however, does dissolve in isopropyl alcohol, meaning the ink is soluble in it.
Because of this, when you added drops of alcohol to the designs on the T-shirt, the ink should have spread out and ran along the fabric with the alcohol, creating a circle full of color.
This is similar to what happens when a drop of water lands on a piece of paper with something printed on it, and the ink starts to run on the paper, making the text blurry. If you let the design that you put water drops on dry, dripping alcohol on it should make the ink run and create another colorful design on your T-shirt!
This activity brought to you in partnership with Science Buddies. Already a subscriber? What To Do Preparation: Use one of the 4 black pens to write a fake ransom note on a piece of coffee filter e. Preparation the day before is ideal. Activity: Divide students into groups of 3 or 4. Tell the students that there are 4 suspects who could have written the note, and that you have a marker from each of them.
In order to find out who took the cookies, we have to find out whose marker matches the ink in the note. Demonstrate how to set up a chromatography test using a strip cut from the ransom note.
Stick this strip up on the board for the students to look at. The students will compare their results to this strip. Number your filter strips 1—4. With pen 1, draw a horizontal line across filter 1, three finger widths from the bottom. Pour water into a paper cup to a depth of 0.
Dip the end of filter 1 into the water and tape it to the side of the cup so that it remains upright. Wait 2—3 minutes for the ink to stop moving and remove the filter to let it dry. Does sand dissolve in ink? Why water is best solvent?
Ink from an ordinary fountain pen spreads if water is spilled on pagewritten on paper does not spread when water is spilled on it?
How do you separate biro ink? Can you make blue ink from something natural? Does salt or ink dissolve at the same rate at different temperature? What property of the ink was used to separate the colours? Why aniline dissolve in alcohol but not dissolve in water?
What is the chemical used to remove Parker ink stains and how it works? Why do you recommend removing ink stains with hairspray? How does salt and ink dissolve at the same rate? Do skittles dissolve faster in hot or cold water? What happens when you mix coloured ink with water? How can water dissolve rocks?
How do you dissolve salt and ink in water? Does salt or ink dissolve at the same rate at different temperatures? Explain how a drop of ink can spread through the water in a beaker without stirring? Will alcohol dissolve in water? Study Guides. Trending Questions. What is the fourth element of the periodic table of elements? Still have questions? Find more answers. In places where there are more ink molecules, there are more collisions with water molecules that bump the ink molecules to other places.
As a result, on average, the ink molecules move from areas with more molecules higher concentration to areas with fewer molecules lower concentration. The higher the temperature of the water, the faster the molecules move. This results in more and harder collisions. Consequently, the diffusion coefficient is proportional to the temperature. How far each ink molecule moves after a collision depends on its diameter, because bigger molecules slow down more from friction compared to smaller molecules.
The intrinsic friction in a fluid is called viscosity. Thus, the diffusion coefficient is inversely proportional to both the molecule's diameter and the liquid's viscosity.
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