The purpose of this lab is to create and perform a chemical reaction to find the percent yield. In this lab it is to be believed that iron will react with sulfur to create iron sulfide. To be able to perform this chemical reaction heat needs to touch the mixture of the two elements, whether it be with a direct flame to the mixture or a preheated glass rod. The independent variable would be the amount of iron and sulfur being used. The dependent variable would be the percent yield found at the end of the lab. Iron is a very brittle, hard substance, that is classified as a metal in the Periodic Table of Elements. It is one of the most abundant of all the metals and its pure form rapidly corrodes from exposure to moist air and high temperatures. …show more content…
It is the 10th most abundant element in the entire universe. The most common use of sulfur is in the manufacture of sulfuric acid which goes into fertilizers, batteries, and cleaners. Sulfur is also used to refine oil and in processing ores. Sulfur in its pure state has no smell associated with it. The smell that comes with sulfur is only when the element forms with other compounds. Sulfurs atomic number is 16 meaning it has 16 protons in the nucleus. The atomic symbol of sulfur is S and the atomic weight is 32.065g. Sulfurs phase at room temperature is in a solid state just like iron. …show more content…
Sulfur is found in nature in pure form as well as in form of sulfide or sulfate. Iron is powder form reacts with sulfur in powder form. Although if you choose to just mix the powders the mixture of the two can still be separated. It could be separated either with a magnet using the metal properties of iron or using carbon disulfide as a solvent for sulfur. The chemical reaction of compounds yields a new compound with different physical and chemical properties of the mixture. To start the reaction of the two compounds the mixture needs to be heated by flame or touched with a preheated glass rod. After the reaction starts it will continue generating heat to where the mixture starts glowing. During the reaction if iron and sulfur iron sulfide is former and the reaction is as follows: FeSFeS. A significant amount of energy is released and the reaction iron(II) sulfide is a quite stable compound. Iron and sulfur may be mixed at room temperature but the reaction requires heat to conquer the activation energy barrier. (Krypton
Hydrogen forms lots of important bonds, primarily with the elements fluorine, oxygen, nitrogen, and carbon. A hydrogen acceptor is an element that accepts hydrogen atoms and is attracted to them. The most common compounds formed by hydrogen are hydrochloric acid, phosphoric acid, and water. Hydrogen bonds are also significant in the construction of synthetic materials, such as nylon, and organic materials like wood and cotton. Hydrogen also bonds with oxygen to form hydrogen peroxide (H2O2), which is a very common household oxidizer. Hydrogen peroxide is used to give white laundry a bleach-free bleaching. Mix it with backing soda for a painful toothpaste substitute. Remove wine, blood, tea, and coffee stains from most fabrics. Make a solution with water and scrub your sink! Water your plants with a peroxide solution to make them perky!
Independent Variable The temperatures are going to differ; this experiment is going to be split up for the various temperatures, therefore each boiling tube has water with different temperatures. In addition, a water bath is going to be used to get a high temperature. Dependent Variable Measuring the time, it takes to dissolve the sugar in the water, in minutes. Experiment 2: Investigating the rate of dissolving with different sizes of sugar particles: Control Variable: 1.
Iron is a trace element, which is a group of minerals present in small quantities in the body. Other trace elements include copper, zinc, selenium, manganese and iodine. These minerals cannot be synthesized by the body and must therefore be supplied in the diet. Iron is the most common trace element in the human body; adult males have approximately 3.5 g iron in total, or 50 mg per kg body weight while females have about 2g total iron or 35 mg per kg bodyweight. Iron can exist in oxidation states from -2 to +6, but mainly exists in the ferrous (+2) and ferric (+3) states in biological systems. As iron has the ability to accept and donate electrons readily, it can interconvert between these two forms with ease. Thus, iron can participate in
Sulfites refer to a group of chemicals that include sulfur dioxide and sulfite salts. Sulfites are naturally occurring sulfur containing molecules that occur in the fermentation process, such as red wines.
The question posed for the conservation lab was: what happens to the mass of a system in a chemical reaction? When new substances are produced in a reaction we say a chemical change has occurred. These changes are very difficult, sometimes impossible, to reverse. Atoms are not created or destroyed in a chemical reaction, they are just rearranged from the reactants to form the products. This is the reason why symbol equations must be balanced. If a chemical reaction is completed in a closed system (when nothing extra can get in and nothing can escape), then the mass will remain constant. But, if the chemical reaction happens in an open system (where air can get in and out), then mass may appear to change.
First is Synthesis. Synthesis is a reaction in which two different substances are combined to create one substance. In a lab, slime was made as an example of a synthesis reaction. Combining
Iron is an important element to the scientific community, especially those involved in the branch of chemistry. Consequently, humans rely on iron for many different things. Iron is diverse from all other elements with regards to its natural occurrence, historic and contemporary uses, the origin of its name, and when, how, where, and by whom it was discovered. It also has unique characteristic physical and chemical properties. Without the discovery, and distinctive properties of iron, life on Earth would never be the same as it is now.
Molar Mass The mass in grams of 1 mole units of a substance. Denoted by g/mol. The molar mass of one mole of atoms of an element is equal to the atomic mass of the element expressed in g/mol, as said earlier, “amu” can be replaced with “g/mol”. Section III.
The question being tested is,” Which fabric (cotton,silk, and polyester) will burn the fastest ?” The hypothesis was that the polyester would be the least fireproof out of the three. The independent variable of the entire experiment was the three different fabrics used which are silk , polyester, and cotton . The dependent variable was the amount of time . The most important procedures was step 5,7,9 the conducting of the experiment where you place the patch of the fabric on the stick leave it exposed for one minute to the fire and measuring the time with the stopwatch for the three fabrics.
In the field of Science, reactions are everywhere! Ice is a physical reaction, rust is a chemical reaction, and the Mentos and Soda experiment is a physical reaction (“Physical and Chemical”). Many may believe this reaction is chemical, but the substance does not change, so it is not. In the following paragraphs I will state three basic points. The first is how the reaction is caused.
The first chemical produced in the world was sulfuric acid, in 1736, the pharmacist Joshua ward was developed a process for its production that involved heating saltpeter & allowing the sulfur to oxidize & it was combine with water. It was the first practical production of sulfuric acid on large scale basis. The first large scale factory was established
We attached a gas syringe via a plastic tube to a test tube and used a
Chemical properties of iron constitute the manner in which it reacts with other chemical compounds. As a matter of fact, iron is known to be a very active element. Iron is known to combine with oxygen in moist environment to form rust. The product of the combination of iron and oxygen is iron oxide (Fe 2 O 3 ). Iron dissolves in acids and reacts to form a salt and water. There are also many other elements that iron is known to react with. Iron reacts with hot water and steam to produce rust and hydrogen gas (Romney, Thacker & Leibold, 2007).
Two substances are mixed together. Explain how the observer could determine if this reaction is just a mixture or an actual chemical reaction. Give an example of two reactants that would form a mixture and two reactants that would form a chemical reaction. (Lesson 7)
Iron is being crucial element in earth’s crust and it is being a basic building blocks of our modern infrastructure. A challengin...