MemberJune 25, 2020 at 8:08 pm
All you need is dry ice and water to make cool, spooky fog or smoke. It’s easy and happens instantaneously. Here’s how to make dry ice fog and how to color it.
Look for dry ice in grocery stores (you may need to ask for it) or specialty gas stores. It’s also possible to make homemade dry ice. The materials needed for this project are:
<div data-reader-unique-id=”14″><ul data-reader-unique-id=”15″><li data-reader-unique-id=”16″>Dry Ice (Carbon Dioxide)<li data-reader-unique-id=”18″>Hot Water<li data-reader-unique-id=”20″>Insulated Container
- <li data-reader-unique-id=”32″>This is so easy! Add chunks of dry ice (solid carbon dioxide) to hot water in a styrofoam or other insulated container.<li data-reader-unique-id=”34″>The fog will sink to the ground. You may use a fan on a low setting to move your “smoke.”<li data-reader-unique-id=”35″>The water will cool, so you will need to refresh the hot water to maintain the effect.<li data-reader-unique-id=”36″>Room temperature matters. You will get the most fog in a cool room. Have fun!
The vapor that comes off of dry ice is white. Eventually, carbon dioxide gas mixes into the air and disappears. While you can’t dye the smoke to produce colors, it’s really easy to make it appear colored. Just add a colored light below the fog. It will illuminate it and make it appear to glow.
- <li data-reader-unique-id=”52″>Dry ice is cold enough to give frostbite. Wear protective gloves when handling it.<li data-reader-unique-id=”53″>Larger chunks of dry ice will last longer than smaller ones. This is because the smaller pieces have more surface area, so they vaporize more readily.<li data-reader-unique-id=”55″>Be aware that extra carbon dioxide is being added to the air. Under some circumstances, this can present an asphyxiation hazard. Cool carbon dioxide vapor sinks before mixing with air, so the highest concentration will be near the floor.<li data-reader-unique-id=”57″>Sometimes inexpensive dry ice machines are available. Otherwise, check party supply stores and shipping companies for availability.<li data-reader-unique-id=”59″>Keep dry ice away from children, pets, and fools! Adult supervision is required.
MemberJune 25, 2020 at 8:11 pm
<b data-reader-unique-id=”titleElement”>Make Frozen Bubbles<b data-reader-unique-id=”subheadElement”>Frosty Fun Science With Dry Ice
<div><div data-reader-unique-id=”59″>By <div data-tooltip=”” data-tooltip-position-x=”left” data-tooltip-position-y=”top” data-reader-unique-id=”61″>Anne Marie Helmenstine, Ph.D.
<div data-reader-unique-id=”64″>Updated June 04, 2020
Dry ice is the solid form of carbon dioxide. You can use dry ice to freeze bubbles solid so that you can pick them up and examine them closely. You can use this project to demonstrate several scientific principles, such as density, interference, semipermeability, and diffusion.
<b data-reader-unique-id=”6″>Materials Needed <div data-reader-unique-id=”8″><ul data-reader-unique-id=”9″><li data-reader-unique-id=”10″>Bubble Solution (from the store or make your own)<li data-reader-unique-id=”11″>Dry Ice<li data-reader-unique-id=”12″>Gloves (for handling the dry ice)<li data-reader-unique-id=”13″>Glass Box or Cardboard Box
- <li data-reader-unique-id=”20″>Using gloves to protect your hands, place a chunk of dry ice in the bottom of glass bowl or cardboard box. Glass is nice because it’s clear.<li data-reader-unique-id=”21″>Allow about 5 minutes for carbon dioxide gas to accumulate in the container.<li data-reader-unique-id=”23″>Blow bubbles down into the container. The bubbles will fall until they reach the layer of carbon dioxide. They will hover at the interface between air and carbon dioxide. The bubbles will start to sink as the bubbles cool and the carbon dioxide replaces some of the air within them. Bubbles that come into contact with the dry ice chunk or fall into the cold layer at the bottom of the container will freeze! You can pick them up for closer examination (no gloves needed). The bubbles will thaw and eventually pop as they warm.<li data-reader-unique-id=”24″>As the bubbles age, their color bands will change and they will become more transparent. The bubble liquid is light, but it is still affected by gravity and is pulled to the bottom of a bubble. Eventually, the film at the top of a bubble becomes so thin that it will open and the bubble will pop.
Carbon dioxide (CO<sub data-reader-unique-id=”33″>2</sub>) is heavier than most of the other gasses present in air (normal air is mostly nitrogen, N<sub data-reader-unique-id=”34″>2</sub>, and oxygen, O<sub data-reader-unique-id=”35″>2</sub>), so most of the carbon dioxide will settle to the bottom of the aquarium. Bubbles filled with air will float on top of the heavier carbon dioxide. Use a tutorial for calculating molecular mass, in case you want to prove this for yourself.
Adult supervision is recommended for this project. Dry ice is cold enough to give frostbite, so you need to wear protective gloves when handling it.
Also, be aware that extra carbon dioxide is added to the air as dry ice vaporizes. Carbon dioxide is naturally present in air, but under some circumstances, the extra amount can present a health hazard.
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