The Effect Of Long Term Exposure Of Certain Household Chemicals Will Have On Cd

During this project, the group will be attempting to turn a penny green. Needed in this experiment will be pennies dated before 1982 because that was when pennies were made of copper. During this experiment, the group will be mixing together different chemical reactions in order to get the penny to turn green. The group is trying to create a patina coating on the penny. Patina is referring to the blue-green layer of corrosion that expands on the surface of copper when it is exposed to oxygen and sulfur compounds. However, instead of using simply sulfur and oxide compounds, like the Statue of Liberty, the experimenters will be using a vinegar substitute. The vinegar is being substituted for the acid rain, the acid is the

Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals.

HYDROCHLORIC ACID IS A CORROSIVE SUBSTANCE WHICH CAN CAUSE DAMAGE TO SKIN AND OTHER SUBSTANCES. IT HAS STRONG VAPORS. WEAR GOGGLES AND AN APRON. YOUR TEACHER WILL SHOW YOU HOW TO POUR THE ACID SAFELY. IF YOU SPILL ACID ON YOURSELF, WASH IT OFF WITH LOTS OF RUNNING WATER. A FEW DROPS SPILLED ON THE LAB BENCH CAN BE CLEANED UP WITH A PAPER TOWEL. A LARGE SPILL SHOULD BE NEUTRALIZED WITH BAKING SODA, AND THE RESULTING NEUTRAL SUBSTANCE CAN THEN BE WASHED INTO THE SINK WITH A

Hydrochloric acid (HCl) has risks as it is a corrosive compound. Corrosive compounds, including HCl, can cause injuries such as burning and eating away skin and eyes. To prevent such injuries, do not come into physical contact with HCl. Wear safety glasses, safety gloves and lab clothing.

1. Gather appropriate lab equipment and secure a safe workspace with open ventilation, away from children and pets. All chemicals will be combined in the 96 well plate. Don’t contaminate end of pipet with other chemicals.

If the audio CD produced an “ERROR” code when you tried to listen to it then it must be caused by a scratch in the CD because a scratch in the CD would allow the audio data to be lost.

After the trial ran for 10 minutes, we measured the distance travelled by the solutes and the distance travelled by the solvent. The distance the solvent travelled was 5.3 cm. The unknown solute travelled 4.1 cm, the Vis-a-Vis solute travelled 4.9 cm, the sharpie solute travelled 5.4 cm, and the Just Basic solute travelled 5.3 cm. By dividing the distanced travelled by the solute by the distance travelled by solvent we calculated the Rf value for each pen type. The unknown had an Rf value of 0.77, the Vis-a-Vis had an Rf value of 0.92, the Sharpie had an Rf value of 1.0, and the Just Basic marker had an Rf value of

DISC Profiles. (2013, September). Different DiSC Profile Behavioral Styles – Learn In Different Ways. Retrieved September 8, 2103, from http://www.discprofiles4u.com/blog/2012/different-disc-profile-behavioral-styles-learn-in-diffe

Chemical changes are often accompanied by physical changes. Three that you should not see in this lab are changes in temperature, presence of a flame, and evolution of light, as when as firefly glows. Three physical changes that indicate a chemical change may have occurred (and that may be seen in this lab) are:

The Chemical Baggies Lab demonstrated to students how certain chemicals cause diverse chemical or physical changes depending on what substances were mixed together in a designed controlled experiment. During the process of this experiment, almost identical observations were made about different combinations of chemicals that had at least one substance in common. For example, the frequent observation that was made throughout the experiment was that heat was felt. Even though there were distinct chemical combinations, there was one substance that generated a certain observation or characteristic, such as a mixture has to comprise of the phenol red for there to be a color change, which was learned from this lab. Also, calcium chloride

Caution – Hydrochloric acid is corrosive to eyes, skin and clothes. Wearing a lab apron, rubber gloves, goggles, and a face shield is essential. Rinse any spills on skin or clothing with plenty of cold water. Clean up spills immediately – ask your instructor for help.

12. Repeated process 4 to 11 for concentration of 20% 4 times, repeated process 4 to 11 for concentration of 40%, 60%, 80%, 100%, each concentration 5 times.

An album on compact disk should find a resting place inside the capsule. With music becoming more and more digital, people will begin to think that music has always existed as a digital download. A compact disk inside the capsule, will show people of all ages in the future will know that a song on the internet lived first a compact disk. Another reason why a CD should sit inside the container is that the CD can inform people of what the previous generation was like. Songs can show that people act in the same pattern generation after generation. From showing how people listened to songs to telling what previous generations acted like, a CD becomes a perfect choice for a time capsule.

Most of a CD consists of an injection-moulded piece of clear polycarbonate plastic. During manufacturing, this plastic is impressed with microscopic bumps arranged as a single, continuous, extremely long spiral track of data circling from the inside of the disc to the outside. Once the clear piece of polycarbonate is formed, a thin, reflective aluminum layer is put onto the disc, covering the bumps. Then a thin acrylic layer is sprayed over the aluminum to protect it, and the CD label is printed onto the acrylic. The compact disc was first used for audio storage only, but are now used to store audio, video, text, and any other information in digital form, and are able to hold 783 megabytes in all.

Many scientific researchers have said that our environment has been filled with toxic chemicals, which us humans have had a part of. There are many different issues that should concern us surrounding these toxic chemicals. The major concern is that many of these toxic chemicals have been claimed to be causing damage to the health of humans and even other life forms. Another concern is that most of the theses toxic chemicals have just recently been produced; and by our environment changing everyday there is no telling what effects these toxic chemicals may have in the long run on the public 's health. Just about all of these toxic chemicals exist in the way they do because of humans. As humans we practice a lot of different activities that cause toxic chemicals to pollute our environment such as, agriculture, industrial, and many domestic activities as well. Many of the toxic chemicals that we produce and use don 't get used in a effective way, which causes them to be wasted, left abandoned, and disposed of. When toxic chemicals are not disposed of properly they effect the environment and the public 's health in a negative way.