Hydrogen cyanide

Frame: The purpose of this lab is to determine if the iron given in the experiment is Fe (II) or Fe (III). Knowing what chemicals are present in a reaction and what chemicals are produced is significant information that can be applied to real world situations. An example of this is rust. Rust usually occurs when iron reacts with water. By being aware of this, substances can be made to remove unwanted rust. The mass of the collected samples will decrease as it is dried due to evaporation. Excess…

used and disposed of before ever presenting a problem, very old or damaged batteries are prone to leaking. Heat and age can cause leaks as can internal pressures that build inside the battery as it is drained. The chemicals inside batteries release hydrogen gas as they are used, which results in pressure on the battery seals. In some cases the batteries may simply be defective. No matter why they leak, batteries release potassium chloride when they do. Potassium hydroxide can cause chemical…

In the Monster Who Fed the World you learn about a German Jew named Fritz Haber. Haber was a genius chemist who learned how to take nitrogen out of the air and turn it into a liquid form to contain to use for fertilizer to help grow food for the overpopulated German nation and later the world. Unfortunately, some things and most things can have good and bad uses. Fritz Haber was born on December 9th, 1868. He was the son of a Jewish merchant in a small town. He had all ways longed for a better…

1.18 Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. Zinc is a silver-gray—colored metal that melts at 420 oC. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 g/cm3 at 25 oC. It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide,…

HCl has a high dissociation constant which means it releases all the hydrogen atoms when dissolved in water whereas, CH3COOH has a low dissociation constant which means it dissociates incompletely, releasing only some hydrogen when dissolved in water. Also, it was evident in the experiment where electricity was passes through the 0.1M of CH3COOH and 0.1M of HCl solutions. The light bulb only lit…

Ionic and Covalent bonds are the two different types of bonds that hold atoms together, each having their own characteristics. The distance and charge determines the type of bond the molecules have. These bonds occur because atoms strive to obtain the ideal valence of 8. Some atoms need to gain or lose electrons in order to achieve the ideal valence. In a covalent bond, the electrons are being pulled by two atoms that are both nonmetals. In other words, the two atoms are sharing electrons, but…

Free radicals are molecules that have at least one unpaired electron. They are typically very reactive, due to their odd number of electrons. These molecules tend to try and gain or lose electrons so their highest energy levels can be filled. They will bond with other compounds in the body, sometimes combining with them, or even taking parts of intact molecules, resulting in even more free radicals (Walling). Free radicals can be formed by natural body processes, such as metabolism. They…

The atomic radius will slowly decrease as you move across a period on the periodic table; this is caused by the addition of protons found in the nuclei of the elements. For every new proton being added, several electrons will also be included into this process by joining the identical energy level (ultimately accounting for one electron per element in said period). The electrons then attract the protons, whilst failing to shield from or repulse this attraction. Given the above information, the…

Helium was discovered by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve at 1895 in England and Sweden. A French astronomer Janssen first obtained evidence for the existence of helium during the solar eclipse of 1868 in India. For many years helium was known as an element that might exist on the sun but unknown on the Earth. Sir William Ramsay discovered helium after treating a uranium mineral. Lockyer and Professor Edward Frankland suggested the name helium. A sample of…

I. Science fair question How does temperature affect the rate at which UV beads lose their color? II. Background Research Did you know that most of the ultraviolet light produced by the Sun is blocked by the atmosphere, but some light does still reach Earth? Ultra violet light can be detected using electronic devices. Important terms that will be discussed in this paper are ultraviolet light, photochromism, chemical reactions, and absolute zero. Relating to electromagnetic radiation having…