Chemical Search Results

How To: Find percent by mass & percent composition

In chemistry you come across problems which ask you to find the percent by mass and percent composition of each element in a chemical compound. To do this the first step is to compute the molar mass. Use the periodic table to look up the mass of individual atoms and multiply it by the number of atoms to find the mass of that element. Now add up all the masses to arrive at the molar mass of the compound. Now to find the percent composition of an element divide the total mass of each element by...

How To: Use gravimetric analysis to analyze sulfuric acid

This video is based on a chemistry experiment. This video is going to explain to us how to use gravimetric analysis in order to analyze sulfuric acid. This experiment should not be done for those who do not have a fundamental knowledge of chemical compounds, reactions and chemical safety. He explains first what he is about to do before he does it. Sulfuric acid is acidic and can be toxic if ingested or in contact with the eyes. Take extreme care with this experiment.

How To: Clean stains with sawdust

Use sawdust to draw the stains out of carpet, floormats, etc. It saves energy since you don't have to wash towels and will be thrown away anyway. This is a quick housekeeping trick that leaves your floors clean and does not hurt the environment. Make sure you properly dispose of chemical and oil waste.

How To: Understand the hemoglobin & its role in the body

An in-depth explanation of the structure of the hemoglobin molecule, the process by which it binds with the oxygen in the lungs, how it dumps the same oxygen molecule at the appropriate location in the body and how carbon-dioxide gets attached to the hemoglobin molecule are the topics which the narrator in this video explains with diagrams and a few equations.

How To: Develop black and white film in the dark room

Developing black-and-white film is an arcane, but very rewarding and useful process if you want to make really good-looking prints from your film. This two-part video goes over the entire process, from chemical measurement and selection to the actual process of developing the film. A must-watch for any would-be film photographer.

How To: Chemiluminescence, oxidation of luminol

In this how to video, you will learn about Chemiluminescence and the oxidation of Luminol. The first solution is Luminol and NaOH. The second is K3 and H202. Luminol is used to detect blood in crime scenes. It reacts with Iron in Hemoglobin. As you can see in the example, it illuminates the chemicals in the dark. This is why it is very useful for crime scenes. It can be used even if the blood is not visible with day light. Thus, it is an invaluable chemical in the name of science and justice....

How To: Shrink an enlarged skin pore

Robert Scot, from ModernMom, shows viewers how to shrink an enlarged skin pore. Scott reminds us that genetics and aging do contribute to enlarged pores and skin condition, but there is still a way to deal with this. There is no way to permanently shrink enlarged pores but you can handle them with time. You can use cleansers and exfoliation to do the trick. Your cleanser should be for oily skin that will naturally purify your skin. You really want to focus on exfoliation and use exfoliates wi...

How To: Make an Assassin's Creed hidden blade prop

Adam from Chemical Reaction wants to show you a little movie magic. This video tutorial will show you how to make an Assassin's Creed hidden blade prop for your homemade film. If you're a fan of the Assassin's Creed video game, then you can't not make this hidden blade. This is a great prop for anybody wanting to recreate it for a fan film. It's cheap and quite easy and works pretty well.

How To: Make homemade ice cream with an ice cream maker

Now that summer is swiftly approaching, it's time to start wrapping your mind around that most enjoyable of summertime treats: Ice cream. While you can certainly go to the store and purchase bulk packages of rocky road, store-bought ice cream is full of gnarly-sounding ingredients that sound more like a chemical found in a mad scientist's lab than actual food (xanthan gum, anyone?).

How To: Create long lasting curls for straight hair

If you have very fine, straight hair and have always had a hard trying to keep your strands curled, this video will give you a look into steps you can follow to solve that problem. Before starting on your hair, collect all the necessary tools which include: flat iron, hair clips, Velcro rollers, hair tie, and comb with pointed tip. To start, prepare your hair by adding mousse. Don’t forget to also add a heat resistant chemical to avoid damage and breakage in hair. Then work with the upper t...

How To: Identify if you have aphids and webworms on mesquites

The video shows how to effectively be aware and get rid of possible webworms or aphids on your mesquites so they won't get damaged later. Here, John White invited Annete Peterson to show how to do so. She starts by informing from what she saw that many mesquites from her neighborhood have deformed leaves and mainly several of them have stripped branches at the tips of the trees. He explains that one of the problems is a webworm on the leaf of the mesquite, and it eats the leaves of the plant ...

How To: Get rid of ants

Ant problem? If the ants have come marching two by two—or, God forbid, 10 by 10—it’s time to put an end to the parade. Here’s how. How to get rid of ants, a guide by Howcast:

How To: Perform the science experiment "Matter of Degree"

Check out this instructional science video that demonstrates how to perform the experiment "Matter of Degree." From the Oregon Museum of Science and Industry's teacher curriculum, "No Hassle Messy Science with a Wow", these are chemical reactions that result in changing temperatures. Follow the step by step instructions to witness a temperature change. The "Matter of Degree" is a great experiment for students to perform.

How To: Perform the science experiment "Of Cabbages and Kings"

Check out this instructional science video that demonstrates how to perform the experiment "Of Cabbages and Kings." From the Oregon Museum of Science and Industry's teacher curriculum, "No Hassle Messy Science with a Wow", learn about this chemical reaction featuring cabbage juice. This is a great experiment for your students to perform. Follow the simple instructions outlined in this video and do the "Of Cabbages and Kings" science experiment.

How To: Synthesize copper(II) carbonate & sodium bicarbonate

This actions is a video tutorial in the Education category where you are going to learn how to synthesize copper(II) carbonate & sodium bicarbonate. For this you will need copper sulphate which is available in root kill and sodium bicarb which is baking soda. Take 100g of copper sulphate and dissolve in about 400ml of water. Now take 69.27g of baking soda. Add baking soda very slowly and keep stirring the solution. You got to be very careful as the chemical reaction will produce lot of carbon...

How To: Get rid of garden slugs without using pesticides

Slugs are one of the most destructive forces of nature that can infiltrate your garden. Chemical pesticides and slug pellets make eliminating them simple, but they are expensive, dangerous, and unnatural. Fortunately, this video is here to explain an easy way to get rid of slugs in a container garden using only a little bit of vigilence and salt. Warning: do not try salting your soil garden! You will kill it!

How To: Build a custom pochade box for oil painting

In this how-to video, you will learn how to build your own custom Pochade box for oil painting. You will need 10 feet of 3/4 x 1/2 trim, 1/4 underlayment plywood,, a table saw for squared cuts, a cordless drill, a dowel no smaller than 3/8, a set of hinges and screws, an Allen bolt and nut for triPod mounting, a piece of glass for the palette, gorilla glue water, and chemical proof. Pre-drill everything to make sure the wood does not split. Make sure that when you drill the hole for the dowel...