Oxygen is one of the most important and widely distributed elements in the world, everyone breathes it every day. The exploration of oxygen is from thousands years ago; at the origin of human culture, on Mesopotamia plain, people started the earliest research about oxygen. “In 1772, oxygen was discovered by Joseph Priestley, in his diary, he wrote: ‘The feeling of it to my lungs was not sensibly different from that of common air, but I fancied that my breast felt peculiarly light and easy for some time afterwards, but maybe, in the future, who could assert oxygen won’t become a kind of luxury’”(Med., 2004). I decided to do the research on oxygen, an element that closely relates to everyone. This experiment will explore the effect of mass of catalyst MnO2 to the initial rate during the creation oxygen, in this paper, I will expound what is catalyst, the function of catalyst, and the way to make oxygen and measure initial rate. Experimental Question In this experiment, I explore the relationship between the mass of catalyst and the initial rates.
Preliminary Research “Kinetics is the study of the speed of a chemical reaction. Some chemical reactions are fast; others are slow. Sometimes chemists want to speed the slow ones up and slow the fast ones down.” (What character effect the speed of chemical reaction.2015)And catalyst is a kind of substance that increases the reaction rate and speeds up the reaction without using up themselves, chemically
In reference to the collision theory, molecules act as small spheres that collide and bounce off each other, transferring energy among themselves when the collide. In order for a reaction to occur, there must be collisions between molecules. Through experimentation, factors are discovered that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, surface area, the physical state of reactants, and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and
Enzymes are biological catalysts, which speed up the rate of reaction without being used up during the reaction, which take place in living organisms. They do this by lowering the activation energy. The activation energy is the energy needed to start the reaction.
Introduction: Chemical reactions are dependent upon two factors: temperature and concentrations of substance. We can monitor the rate at which a chemical decomposes or the rate at which a chemical substance appears. In this experiment we will be measuring the rate of decomposition of hydrogen dioxide with the following reaction:
In this week’s lab experiment, the rate of decomposition of hydrogen peroxide forming oxygen gas will be observed and studied. Since the rate of a chemical reaction is dependent on two things; the concentrations of the reactants and the temperature at which the process is performed, the rate can be measured at which a reactant disappears or at which a product appears. When measuring the rate, the rate law will be applied. The objective of this lab is to demonstrate how the rate changes with varying initial concentrations of hydrogen peroxide by measuring the rate at which oxygen is evolved.
2. A catalyst is a chemical agent that speeds up a reaction without being consumed by the reaction.
Oxygen is a highly reactive nonmetal element that is a colorless, odorless and tasteless gas. It is the third most abundant element in the universe by mass, makes up 2/3 of the mass of a human body and about one-fifth of Earth’s atmosphere (Helmenstine, 2016). The discovery of this magnificence element can not credited to solely one individual. Both Joseph Priestley and Antoine Lavoisier should receive credit for proposing new ideology and experimental findings that lead to the discovery of oxygen.
Catalysts (p. 105) - is any substance which makes a chemical reaction go faster, without itself being changed.
Increasing the average energy of each particle meaning that more particles have enough energy for the particles to collide and bond. However this effect is short lived as most catalysts have a specific heat temperature range above or below that will slow down the rate of reaction, or even cause
In this lab relating to the Law of Conservation of Mass, the mass changed because the gas was released from the chemical reaction. The Law of Conservation of Mass demonstrates that before and after the chemical reaction, the mass of reactants and the mass of products have to be the same.
In this lab, we will create a chemical reaction between the reactants oxygen (O2) and magnesium (Mg) using combustion. The product will be magnesium oxide (MgO). In this lab we will record the masses of reactants and products to perform stoichiometry of the chemical equation Mg + O2 -> MgO. The actual yield of product will differ from the theoretical yield based on how the experiment is performed. The independent variable is the product amounts and the dependent variable is the percent yield.
The unit, Chemical Reactions and Fossil Fuels, is designed for a 10th grade Honors Chemistry. Students will explore the ideas of heat, energy and chemical reactions. Students will connect the concept of energy and chemical reactions with their impact on their environment. Students will focus on fossil fuels as a form of energy and if they are harmful to the environment. Students will use previous chemistry curriculum when we discuss the meaning of energy, heat, and chemical reactions; they will have the opportunity to think about the impact of fossil fuels on the environment; and finally students will research and defend their position on fossil fuels and alternative energy in a debate format. This will demonstrate what they are thinking and what they have learned throughout this unit.
An enzyme is a catalyst. Catalysts are known for speeding up the rate of reactions by lowering the activation energy of the biochemical reaction. (Reece et al., 2011)
This is a fair test because the only thing that is changed is the drop
Kinetics of chemical reactions is how fast a reaction occurs and determining how the presence of reactants affects reaction rates. In this experiment the rate of reaction for Fe+3 and I- is determined. Because the rate of chemical reactions relates directly to concentration of reactants, the rate law is used to find the rate constant, and calculated with specified temperatures.
A catalyst is a chemical that increases the rate of a chemical reaction but is not permanently altered by the reaction.