Acid Oxidation Lab

Clean up and return the materials. Paragraph 3 In my bar graph I presented the relationship between the temperature of water and an Alka-Seltzer’s rate of reaction time when dropped into the water. The data proves that if the temperature of water increases, then the reaction rate of an Alka-Seltzer tablet will increase as well. I presented the data of the temperatures; 21°C, 41°C, and 28°C for each four trials and their averages. The graph presents the trend of the rate of reaction decreasing when the temperature is lower.

Substrate concentration basically means the amount used for the substrate. The substrate in our experiment was 0.1% hydrogen peroxide. The 0.1% is the concentration amount. Just like temperature and pH, substrate concentration can speed the reaction only up to a certain limit. When we mixed pH 3 enzyme tube with substrate tube, we used 0.3 mL of hydrogen peroxide, but if we were to increase the amount, then the experiment would have been faster.

Then, we did reflux for 75 minutes. After reflux, we removed the reaction mixture from the apparatus and cooled it for several minutes. We transferred the mixture to the beaker that contained water (30 mL). We cooled the mixture to room temperature and added sodium carbonate to neutralize the mixture. We added sodium carbonate until the pH of the mixture was 8.

According to the collision theory, a reaction can only occur if particles collide with sufficient energy to overcome the activation energy and with correct geometrical orientation (3). Increasing temperature increases the kinetic energy of the particles which means that an increase in temperature will increase the speed of the hydrogen peroxide and the catalase molecules which

Volume of acidic solution Volume of the water was measured in a graduated cylinder. More acidic solution will result in higher rates of corrosion and vice versa Time in acidic solution A stopwatch was used to measure the amount of time each sample was kept in the solution The amount of corrosion will increase as the sample is kept in the solution for longer periods of time. Temperature of Room The temperature of the AC was regulated to be constant. The temperature can affect the rate of the reaction, which in turn will affect the experiment. Procedure: • Cut each sample of marble sample must be cut into equal pieces and must be then measured to match a weight of 50g in the weighing

The purpose of this experiment was to analyze the rate of the catalyzed decomposition of hydrogen peroxide in regard to the effects of concentration and temperature. 2H2O2 (l) —I-—> 2H2O (l) + O2 (g) In part one of the experiment, catalyst KI was added to varying solutions of 3% hydrogen peroxide and DI water and the composition of hydrogen peroxide was observed. This was observed by collection the volume of oxygen gas produced during the decomposition, and measuring its volume. From that, volume of oxygen gas produced was plotted against time and a linear least square fit line was generate. From the line equation, rate was derived, rate is equal to the slope of the line.

ABSTRACT To catalyze a reaction, an enzyme will grab on (bind) to one or more reactant molecules. In this experiment we examined how increasing the volume of the extract added to the reaction would affect the rate of the reaction. The enzyme used was horseradish peroxidase which helps catalyze hydrogen peroxide. Using different pH levels, the absorbance rate of the reaction was measured to see at which condition the enzyme worked best. The rates of absorption were calculated using a spectrophotometer in 20 second intervals up to 120 seconds.

They tested how the temperature would affect the rate of reaction. This was observed by the amount of time it took for the solution to change colors. For many chemical reactions there is an optimum temperature at which the chemicals will react with each other. As was found in their experiment, the temperature affected the rate of reaction. (Deoudes, 2010).

If the ratio is close to 1.0, the subject is most likely in extreme exercise and utilizing only carbohydrates. The ratios of oxygen and carbon dioxide are shown through the oxidation reactions of both fat and carbohydrates. It is possible to calculate an RER higher than 1 because of hyperventilation in the lungs [2]. The respiratory quotient (RQ) is the measurement of CO2 and O2 in the tissues at the cellular level. The most accurate way to determine RQ is through the bicarbonate buffer reaction where the amount of hydrogen ions show metabolism.

Effect of Yeast on Temperature on Hydrogen Peroxide Solution in Water Khalid Al Sabeeh Ms. Dobrin 11-G Chemistry HL Jan 5, 2015 Abstract: Within this lab yeast was added to hydrogen peroxide solution in water. Temperature was the factor to be tested. In all trials, the initial and final, when yeast was added temperatures increased by 10˚C respectfully per trial. This is because hydrogen peroxide is unstable and when decomposed it increases the thermal temperature. Introduction: Hydrogen peroxide (H202) is an often-unstable compound that has a similar chemical formula with water but with an extra oxygen (Cool Science).