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There is a natural attractive tension that exists among the molecules of liquids and, therefore, within the surfaces of liquids. This Surface Tension is what enables rainwater, for instance, to form into separate droplets on a window pane.

The Surface Tension of the liquid also enables each droplet to assume its symmetrical, uniform shape rather than spreading itself thinly and randomly across any hard surface.

If a open window is horizontally hinged and thus sloping, the droplets will take a more circular shape as the window is opened further and the stretching effect of gravity is lessened. In a smaller droplet the surface tension becomes larger in proportion to any other forces acting on the liquid and this allows it to become more nearly spherical in spite of the pull of gravity.

It is the same attractive forces between molecules that keep a droplet clinging to a surface, due to the attractive forces between the liquid molecules and the molecules that make up the harder surface.

The same attractive forces cause the liquid to be taken up into an absorbing medium such as tissue paper. This time there is no clean, even and solid surface for the liquid to adhere to; the tissue comprises a tight tangle of the minute surfaces of all the very fine fibres that make up the paper.

If the adhesive force between liquid and tissue fibre is stronger than the force of molecular attraction within the liquid, then the liquid will be drawn into the tissue. In other words, if the Surface Tension is not too great a liquid will be absorbed into a paper towel. And, if the Surface Tension can be reduced the absorption will happen more quickly.

The Surface Tension of a liquid can be reduced by dissolving another substance into it.

The surface tension of pure water, for example, would be higher than the surface tension of the same water with soap or lemonade concentrate mixed into it. One of the deliberately selected properties of a soap or detergent is its ability to greatly reduce the surface tension of tap water. Heating it up also reduces the surface tension of water.

That is why your lemonade and your warm soapy water are more quickly absorbed by the paper towel.

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How do you remove dry ink from paper?

One method to remove dry ink from paper is to gently scrape the surface of the paper with a sharp tool, such as a razor blade or knife, being careful not to tear the paper. Another method is to lightly dab the ink stain with a cotton ball or cloth soaked in rubbing alcohol or nail polish remover. Test a small, inconspicuous area of the paper first to ensure the solvent does not damage it.


How is ink collected from a piece of paper?

Ink cannot be collected from a piece of paper once it has been applied. Ink is absorbed into the fibers of the paper or dries on the surface, making it difficult to remove without damaging the paper.


What is the separation process which works because some colours are absorbed more easily by paper than others?

Chromatography is a separation process that works because some colors are absorbed more easily by paper than others. The different components in a mixture will move at different rates as the solvent travels up the paper, resulting in separation based on their affinity for the paper.


How does a grease spot form on a piece of brown paper?

A grease spot forms on a piece of brown paper when a substance containing oil or fat is transferred onto the paper. The oil or fat is not absorbed by the paper and thus forms a visible spot.


What color does red litmus paper turn in lemonade?

When you put the blue litmus paper into the extract of a citrus fruit (Calamansi for example), it will change its color and turn red. This is the result of our experiment!

Related Questions

What is a blotter?

Paper that is soaked in liquid LSD, then cut apart into square "tabs" or "blotters".


How did ancient Chinese make paper?

first they made the fabric then they soaked it then dried it by putting it in fire then wrote on it.


Alessandro volta constructed the first what out of layers of silver zinc and paper soaked in salt water?

Alessandro Volta constructed the first electric battery out of layers of silver, zinc, and paper soaked in salt water. This invention, known as the voltaic pile, produced a continuous electric current and was a significant development in the field of electricity.


Is a salt soaked paper towel a good conductor of electricity?

Assuming you mean "salt water soaked", yes.


How does the stuff get in the blotter paper?

Blotter paper is soaked in a liquid solution of a compound, then allowed to dry out.


What is oiled paper?

Oiled paper is paper soaked in oil, used mostly for wrapping things, as opposed to regular paper that's used for printing.


What happen with drop of oil on a paper?

When a drop of oil falls on paper, the paper absorbs some of the oil while the oil spreads out and is eventually absorbed by the paper due to capillary action. The oil can leave a stain on the paper as it is absorbed.


What scale compares the color of blood-soaked paper with a standard?

Tallquist method


What is a sentence with absorbed?

As I read the book, I was completely absorbed in the story and couldn't put it down.


Will paper sink?

Paper will sink once it has absorbed enough water to make it heavy.


What color lemonade litmus?

Lemonade, typically made from lemon juice, water, and sugar, is acidic due to the citric acid present in lemons. When tested with litmus paper, it will turn blue litmus paper red, indicating its acidic nature. Conversely, red litmus paper will remain red.


How can you make a living aquarium out of lemonade and a cardboard box?

Neutralize the acid in the lemonade using a buffer. Then distill the lemonade until you are left with pure water. Then trade the carboard box to a dummy for a glass aquarium. Either that or put the lemonade into your eye, cut yourself with the box paper, and get a life.