Dip this into the soap solution and with a friend pull the handles apart to form a giant soap film. Trying shaking one end and watch the wave travel along the film. Wet a tray or the kitchen work-surface with your bubble solution. Using a straw, blow a large bubble.
Push the straw through the original bubble and blow a smaller one inside. See how many smaller bubbles you can make! Marten size finally allowed Annie to walk on water". Water has many unusual properties, one of which is the phenomenon of surface tension.
As we said earlier, surface tension is the force that prevents a blob of water on a surface from spreading out. Surface tension allows pond skaters and other insects to walk across water and also allows a pin to float. You can demonstrate this yourself by taking a bowl of water and floating a pin on the surface. Carefully add just one drop of washing-up liquid and see what happens to the pin.
It should sink immediately because the detergent molecules break apart the forces holding the water together. The pin is no longer supported and so sinks to the bottom! You can measure surface tension yourself by making your own button balance, like the one used by the famous nineteenth century home experimentalist, Agnes Pockels.
You will need:. List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Featured Video. Cite this Article Format. Helmenstine, Anne Marie, Ph. Examples of Organic Chemistry in Everyday Life.
Examples of Chemical Reactions in Everyday Life. Sulfuric Acid and Sugar Demonstration. Liam and Sarah explain that HE detergents are at least double the concentration of traditional detergents. Though pre-portioned pods are convenient, you have less control over the amount. This can quickly lead to a buildup of chemicals and cleaning agents that stiffen your laundry. To restore your wardrobe to its full glory, you need to remove the buildup of detergent burrowed into its fibers.
Cleaning a fabric means running that process in reverse. Most detergents use ionic surfactants, so one can expect that a gradient in the surfactant will generate an electric field. However, surfactants have an additional property: they will normally attach to a particle in the solution.
Thus a neutral particle can become charged when detergent molecules attach to it. To explore diffusiophoresis in fabric cleaning, Shin and his colleagues ran experiments in a microfluidic channel connected to a series of micrometer-wide, dead-end pores. When fluid flowed through the main channel, there was little flow into the pores, mimicking the situation of stagnant cores in fabrics.
The team allowed dirt—represented by micrometer-sized, fluorescent, polystyrene particles—to accumulate inside the pores. They then mixed in a detergent, sodium dodecyl sulfate, which produces a negatively charged surfactant ion in solution. As a control test, the team flushed the channel with detergent-filled water. This flow was unable to dislodge particles in the pores, and as the concentration remained more or less uniform, there was no help from diffusiophoresis.
That changed when the team rinsed with fresh water.
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