What are white spots? The white spots on teeth are blemishes that are signs of demineralization under an intact enamel. The damage is usually called hypocalcification while the spots are called hypoplasia. Once there are white spots present, this may also indicate a tooth decay or cavity formation has started. What are the causes of white spots on teeth? There are a number of factors why white spots occur and some of these factors are as follows: • Fluorosis. This is a condition which damages the
The Effect of Surface Area on the Rate of Reaction Between Catalase from a Potato and Hydrogen Peroxide Aim To find out the relationship between the surface area of a potato chip and the rate of reaction when hydrogen peroxide is put in with it. Variables As I do this experiment the thing I am going to be changing is the surface area of the potato chip, first I will put it in the beaker as a whole (3cm chip) then I will start cutting it into smaller pieces and repeating the experiment
Catalase and Hydrogen Peroxide Useful info The Enzyme Catalase is a protein molecule which is found in living cells. It is used to speed up reactions in the cells. It is a very specific enzyme and just performs one particular reaction. Catalase is an enzyme found in cells in potatoes and liver and is used for removing Hydrogen Peroxide from the cells. Hydrogen Peroxide is the poison produced during metabolism. Catalase aids the decomposition of Hydrogen Peroxide the by products of which
reaction from sodium perborate or carbamide peroxide (CH6N2O3, or CH4N2O.H2O2)[6]. Hydrogen peroxide (30-35%) and carbamide peroxide are mainly used for vital bleaching, while sodium perborate is used for non-vital bleaching. Hydrogen peroxide oxidizes organic and inorganic compounds by free radicals (OH•, O•-2).O•-2 is produced in large no by ionization of weakly acidic aqueous hydrogen peroxide while OH• is produced by ionization of buffered hydrogen peroxide at ph 9.5-10.8.But OH• has better bleaching
Chemistry Investigation An investigation to find the optimum temperature that will produce the maximum amount of oxygen from hydrogen peroxide using the enzyme catalase Introduction Hydrogen peroxide is poisonous to all living things if it builds up in the cells but when it is introduced to the enzyme catalase the react between the two makes water and oxygen as byproducts. There are many factors witch affect the production of oxygen these are listed below. For this experiment the enzyme
the Effect of pH on Immobilised Yeast Cells on the Breakdown of Hydrogen Peroxide Safety: ======= * Extreme alkaline and acids are used so must wear gloves, goggles and apron. * Be very careful not to make contact with any of the chemicals, as they will be irritable and some corrosive to the skin and eyes. * There must be no running and any other normal laboratory rules should be followed as usual. * Hydrogen peroxide is corrosive and so should not be touched. * A lab technician should immediately
How the concentration of enzymes controls the breakdown of Hydrogen Peroxide? Aim- We are investigating the effect of changing the concentration of the enzyme catalase has on the rate of breaking down of Hydrogen Peroxide. Background Info- This experiment will involve some soft potato. Potato has a very high enzyme count, that¡¦s why we use it in this experiment. This enzyme is called catalase. It is used in our body to break down food and other things that we might digest. A catalase speeds
What Affects the Rate of Breakdown of Hydrogen Peroxide by Enzymes Aim === The aim of this experiment is to find out how temperature and concentration affect the breakdown of hydrogen peroxide by an enzyme (yeast). I hope to achieve reliable results that will confirm my predictions. Prediction ========== I predict that if the concentration is high in the yeast then the speed of oxygen produced in the reaction with hydrogen peroxide will also be high. This is because the amount
made of proteins and they speed up reactions, this means that they act as catalysts. Hydrogen peroxide is a byproduct of our cell's activities and is very toxic. The enzymes in our bodies break down the hydrogen peroxide at certain temperatures they work best at body temperature, which is approximately 37 degrees. At high temperatures, the cells begin to denature. This means that the hydrogen peroxide is prevented from being broken down because they will not 'fit' into the enzyme.[IMAGE] Objective
Hydrogen Peroxide Investigation When hydrogen peroxide is added to a piece of fresh potato, bubbles of gas are seen to form. When a bigger piece of potato is used, a larger number of bubbles is produced. A possible explanation for this observation could be that oxygen is produced when hydrogen peroxide is broken down by the enzyme catalase. A large piece of potato will contain a higher amount of catalase than a smaller piece and therefore produces a greater volume of oxygen. The Task
Rate of Reaction Between Hydrogen Peroxide and the Potato Prediction The predictions for the rate of reaction, between the Hydrogen Peroxide and the potato. For this experiment there are some vital factors referred to the rate of reaction between the hydrogen peroxide and potato slice. For this experiment I will predict what the affect of the concentration, particle size and temperature would be. The Concentration:Would a low concentration be better for the experiment or a high
containing more than about 8 percent hydrogen peroxide are corrosive to the skin. First recognized as a chemical compound in 1818, hydrogen peroxide is the simplest member of the class of s. Of the several processes of manufacture, the principal ones involve reactions of oxygen from the air with certain organic compounds, especially anthraquinone or isopropyl alcohol. Major commercial grades are aqueous solutions containing 35, 50, 70, or 90 percent hydrogen peroxide and small amounts of stabilizers (often
Analysis of the Decomposition Rate of Hydrogen Peroxide With Catalase As a Catalyst Aim: To measure the rate of decomposition of Hydrogen Peroxide with Catalase from a Yeast solution using PH as a variable. Hypothesis: The enzyme Catalase speeds up the Hydrogen Peroxide decomposition as its active sites match the shape of the Hydrogen Peroxide molecule. This process will only work at certain PH levels as the Enzyme sites may become disfigured at extremes. Logic suggests that Catalase will
the Production of Oxygen From Yeast and Hydrogen Peroxide Planning Aim --- My aim is to discover how temperature effects the production of oxygen from yeast and hydrogen peroxide. I will mix yeast with hydrogen peroxide and use an upturned measuring cylinder to measure how much oxygen is produced. To find out how much hydrogen peroxide and yeast I will use, I will carry out pre-tests
The Effect of Changing the Concentration of the Enzyme Catalyst on the Rate of Reaction on Hydrogen Peroxide Planning -------- Hydrogen Peroxide Water + Oxygen 2H2O2 2H2O + O2 Introduction - Background Information ------------------------------------- To help me understand what a chemical reaction is or involves I did some research. A chemical reaction is a process by which atoms or groups of atoms are redistributed, resulting in a change in the molecular composition of
Investigating the Rates of Reaction Between Hydrogen Peroxide and Manganese Dioxide Aim: My aim for this investigation is to find out how concentration affects the rate of reaction between hydrogen peroxide and manganese dioxide. Equipment List: Syringe filled with water (gas collector); Conical flask; Manganese dioxide powder; Hydrogen Peroxide liquid; Measuring cylinder (5 ml); Timer; Clamp and Stand; Cork; Glass (delivery) tube; Water Basin with water;
The Rate Law for Chemical Reaction Among Hydrogen Peroxide, Iodide, and Acid To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations Experiment 3 Chemical Kinetics Objectives 1. To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations of H2O2, and H+ affects the rate of reaction.
Effect of a Catalase on the Breakdown of Hydrogen Peroxide Aim To follow the progress of a catalysed reaction by measuring the volume of gas produced as the reaction proceeds. Using the initial rates of a series of experiments I will be able to find the orders of the reaction with respect to enzyme and substrate. Also to find out if concentration has an effect on the reaction when an enzyme is used to accelerate the breakdown of hydrogen peroxide. Introduction / Background Information.
Investigating the Effect of the Enzyme Catalyse On Hydrogen Peroxide Introduction The aim of this experiment is to determine the effects of varying enzyme (catalyse) on Hydrogen Peroxide. Hydrogen Peroxide + Catalyse à Water + Oxygen 2H2O2 à H2O + O2 + Heat Apparatus & Diagram [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE] Bung Potato Hydrogen Peroxide Water Collected Oxygen Delivery Tube Measuring Cylinder [IMAGE] Using the Equipment Safely It
"To See What Factors Affect The Decomposition Of Hydrogen Peroxide By The Enzyme Catalase Which Is Found In The Liver" Introduction: Enzymes are biological catalysts. They speed up the chemical reactions which go on inside living things. Without them the reactions would be so slow that life would grind to a halt. Enzymes work by when a substrate molecule bumps into a molecule of the right enzyme, it fits into a depression on the surface of the enzyme molecule. This depression is called the active