Chemical laser

I. PURPOSE The purpose of this lab was to observe the physical properties of different samples of matter and to use your observations and knowledge of chemistry to classify each sample as an element, a compound or a mixture. II. MATERIALS 10 beakers containing different samples of matter III. PROCEDURE First off, put on a laboratory apron. Then, take a few minutes at each lab station and record three physical property observations of each sample of matter. Record the three physical property…

The purpose of this lab is to solve for the equilibrium constant of a reaction between iron (iii) ions and thiocyanate ions. The lab is divided into two parts: one section recording absorbance of reference solutions and the other part for the absorbance of test solutions. The reference solutions were created through the mixing of excess iron (iii) nitrate (Fe(NO3)3) with a known concentration of potassium thiocyanate (KSCN) in order to push the reaction to completion; the initial concentration…

embedded in a matrix are most often found in the famous spanish mines. http://www.minerals.net/mineral/pyrite.aspx Pyrite’s chemical formula is FeS2, which is the same as the much rarer mineral, Marcasite. Even though these two have the same chemical formula, they both crystallize differently, causing them to be classified as different minerals. Sharing the same chemical formula causes these two minerals to be mislabeled, since their physical characteristics are so similar, and the only real…

maintains the pH level of a substance by releasing or accepting H+ ions to adjust the concentration within the substance. It contains both a base and an acid in order for it to react with either added H+ or OH- ions. Take for example the following chemical equation: HCO3 + H+ → H2CO3. In this equation the buffer bicarbonate encounters H+ ions or an acidic substance containing these ions and bonds with them in order to form carbonic acid. This reduces the number of free acidic H+ ions and…

next thing that was miscommunicated over the next few days following the incident were the levels of environmental contamination. Ron Lewis of the Parkersburg News and Sentinel reported that the Ohio Environmental Protection Agency (OEPA) and Shell Chemical Company spokesman Rob Berger said that nothing from the fire fighter’s water sprayings made…

atoms by separating two metals. The galvanized iron was measured to two decimal places in centimeters then weighed for mass to three decimal places in grams. The galvanized iron was then stripped of it’s layer of zinc by using hydrochloric acid. The chemical reaction of the experiment is shown below: 2 HCl (aq) + Zn(s)----> H2 (g) + Zn2+(aq) + 2 Cl-(aq) Once the iron was free of the zinc layer, it was then weighed again for its new mass. The mass remaining is the mass of the iron present…

The uptake of oxygen into muscles is what facilitates muscle contraction. Oxygen that is obtained through breathing by the lungs is transported to the rest of the body, as well as the heart by means of haemoglobin. The rate of liberation of oxygen from haemoglobin has an effect on the quantity of oxygen available in the muscles for a muscle contraction to ensue. The higher the oxygen concentration in the muscle the greater the force of muscle contraction. Temperature has an effect on the…

Most enzymes are catalytic proteins made up of amino acids and are a key part of the breakdown and synthesis of virtually every biological catalysis reaction mechanism. The primary function of a catalytic enzyme is to increase the rate of reaction by helping the enzyme overcome the activation energy barrier without the reaction consuming or changing the enzyme. In enzymatic reactions, the substrate binds to the highly specific enzyme active site (the substrate-binding domain) and forms an…

People find out new things about the world every day. Scientific findings are almost never final. Experiments can verify or shatter what we perceive as facts of life. Atoms are an example of this. Thinkers and scientists from throughout time have been theorizing and experimenting to find out what an atom is made of. The structure of an atom is very complex, and because of that, its known structure has drastically changed over time. What we know as an atom today is composed of many subatomic…

The goal of this experiment was to determine the Michaelis constant (Km) and also the maximal velocity (Vmax) and the inhibition of alkaline phosphate. In order to accomplish these goals, 5 samples were used. Each sample contained different volumes of 0.2 m MPNPP (p-nitrophenylphosphate) and 0.2 M Tris-Hcl at a pH of 8.0. To each sample 0.2 mL of the enzyme studied (Alkaline Phosphatase) were added upon insertion on the spectrophotometer apparatus. With intervals of 20 seconds their absorbance…