Chemical Reaction Lab Report

When combined Sodium Bicarbonate and Hydrochloric Acid, Carbon Dioxide is produced. The two chemicals do not undergo a change in color but a chemical change when CO2 is produced.

Conclusion The mass of the recovered copper was 5.22g, much greater than the initial mass of copper, 2.09. The number of moles of the recovered copper was calculated to be 0.0821mol while the number of moles of the initial copper was calculated to be 0.0329mol. The percent of copper recovered was calculated to be 250.%, and the percent error of copper recovered was calculated to be 150.%. From what seems to have been an increase in copper from the initial mass to the recovered mass, it can be assumed that the copper solid recovered at the end of the lab contained compounds other than the expected copper, as there was no way for additional copper to be introduced into the reactions.

i. The mixtures used in the IAA odor detection test shall be prepared in an area separate from where the test is performed, in order to prevent olfactory fatigue in the subject. j. If the test subject is unable to correctly identify the jar containing the odor test solution, the IAA qualitative fit test shall not be performed. k.

Molar Mass of NaHCO3 = 84.098 g/mol Moles in 0.10g = 0.10/84.098 = 0.00119 mol Moles in 0.20g = 0.20/84.098 = 0.00238 mol Moles in 0.30g = 0.30/84.098 = 0.00357 mol Moles in 0.40g = 0.40/84.098 = 0.00476 mol Moles in 0.50g = 0.50/84.098 = 0.00595 mol Moles in 0.90g = 0.90/84.098 = 0.0107 mol Molar mass of CH3COOH = 60.052 g/mol Moles in 5g = 5/60.052 = 0.0833 mol Amount of grams in 5mL of CH3COOH = 5mL* 1g/1mL = 5g CH3COOH

1. Describe what the results were. According to the results, the higher the concentration of sodium thiosulphate the higher the reaction rate. The graph above shows the reaction rate compared to the sodium thiosulphate solution is almost a straight line showing the relationship of the sodium thiosulphate and the rate of reaction.

This section of the experiment was composed of a series of different chemical reactions. In the first reaction, a small piece of zinc is placed is in a test tube that contains 2 mL of 6 M HCl; observations were then recorded. The next reaction, which should take place under a hood, requires a 1-inch copper wire to be placed in a clean test. Concentrated nitric acid is then added and observations are recorded. In the third reaction, 1 mL of 0.1 M sodium oxalate, Na2C2O4, is placed in a clean test tube.

Subsequently, the autoclave was purged with carbon dioxide and alternately evacuated 3 times, followed by adding purified PO with a large syringe. The autoclave was then pressurized to 5.0 MPa via a CO2 cylinder. The copolymerization was performed at 60°C under stirring for 40 h. The resulting viscous mixture was removed and dissolved in a proper volume of methylene chloride. The residual catalyst was extracted from the product solution by using 500 mL of dilute hydrochloric acid (5%), followed by washing 3 times with distilled water.

Matter is anything that has mass and takes up space. During the late eighteenth century, scientists began to use qualitative tools to study and monitor chemical changes. By carefully measuring mass before and after many chemical reactions, it was observed that, although chemical changes occurred, the total mass involved in the reaction remained constant. Assuming this was true for all reactions, chemists transformed this observation into a scientific law; the law of conservation of matter, which states that mass is neither created nor destroyed during a chemical reaction, it is conserved. In other words, the mass of the reactants equals the mass of the products.

In this science project I will be testing how temperature alters the results of a chemical reaction. My goal is to answer my hypothesis question and give a good explanation of what is being done in this process. Either a cold or hot temperature can turn the liquid into a bubbling result. After looking at my observations, I will justify how it is bubbling and show what is going on inside the liquid. As I research more information and facts about my topic, I will start to gain more knowledge and understand how my experiment should turn out.

When the hydrochloric acid (2HCl) and the calcium carbonate (CaCO3) combine it forms calcium chloride (CaCl2) + water (H2O) and carbon dioxide (CO3). This is because the chemical reaction is an acid-base reaction (where an acid + a carbonate (or a hydrogen carbonate) combine to form a salt + water + carbon dioxide) which is specific type of gas evolution reaction (a chemical process that produces a gas, such as oxygen or carbon dioxide). During a chemical reaction the bonds between the atoms in the reactants are broken and to form products that are physically and chemically different from the reactants. In this situation CaCO3 reacts with 2HCl to form CaCl2 and H2CO3, the carbonic acid then decomposes into water and carbon dioxide. When the

Enzymes are protein molecules composed of amino acids and are made by the living cell. These molecules provide energy for the organism by catalyzing various biochemical reactions. If enzymes were not present in cells, most of the chemical reactions would not proceed at measurable rates at the temperatures of living systems. Therefore, we can say that being involved as catalysts is the main and most important role of enzyme in any organism. Many reactions that are thermodynamically favored do not occur quickly because of a lack of energy necessary to initiate the reaction.

Most people think that the coke and mentos reaction is a chemical reaction, but it is actually a physical reaction. This is because of a process called nucleation. All of the carbon dioxide in the soda is squeezed into the liquid and wants a way out. The carbon is drawn to the porous surface of the mentos, called nucleation sites. These sites provide places for the carbon to form bubbles(eepybird.com).

Throughout the world, chemical reactions are taking place to either achieve a specific purpose or prevent a specific outcome. These reactions can be as simple as boiling water to pour a coffee in the morning or as complex as industrial level biochemistry. Whether you are aware of it or not, you create numerous amounts of chemical reactions every day. According to the collision theory, a chemical reaction will occur if two or more molecules collide with the right amount of energy and the right orientation. The energy that is required from the collision depends on the molecules and can be referred to as activation energy.

In our first Chemistry lab, I was tasked with using volumetric tools and devices in order to find the density of water, a sugar solution and determining the amount of beads within a container while maintain the appropriate significant figures. The main skill goal of the experiment was to gain knowledge on the use of volumetric measuring tools such as beakers, graduated cylinders and volumetric pipets. This experiment was designed for us to learn how chemistry lab equipment is used and maintained, while also giving us the opportunity to use this equipment in several uniquely designed experiments. This makes the experiment very useful in our knowledge of how scientific labs operate and how chemistry experiments are conducted through the proper

A chemical reaction is the process by which a chemical change will lead the formation of new substances. In this lab, we mix Hydrochloric acid with distilled water to dilute the acidity of the acid, then we add some magnesium ribbon and watch how long the magnesium takes to corrode in the acid. From this we learn how the collision theory works, the collision theory explains how products are formed from reactants. In order for this to occur, the reactants need to collide with each other at the right orientation and enough activation energy to produce the product. The Hydrochloric acid and the magnesium ribbon are the reactants and the corrosion of the magnesium and the release of hydrogen gas are the product.