The Effect of Temperature on the Rate of Reaction Essay

· I predict that the enzyme will work at its best at 37c because that

Title: The Effect Temperature of Sodium Thiosulfate Has On The Rate of Reaction with Hydrochloric Acid

Aim: To investigate the effect of temperature on the reaction rate of hydrochloric acid and magnesium.

Question: How does changing enzyme concentration or temperature affect the reaction time of enzyme activity?

Hypothesis: If the temperature (I.V.) of materials in the reaction are increased, the reaction time (D.V.) will decrease.

In this experiment we tested the effects that enzymes and substrate have on chemical reaction rates, which is the rate at which chemical reactions occur.. This experiment tested how different concentrations of enzyme and substrate affected the light absorption measurements on a spectrophotometer. The experiment also tested how temperature affected the light absorption, and in a separate test, the effect of the enzyme inhibitor hydroxylamine was also tested. In the first test conducted, 3 different concentrations of enzyme, and three different concentrations of substrate were measured in a spectrophotometer. For the enzyme and the substrate, the measurements got higher as the concentrations were higher, but the over measurements of the substrate were smaller than those of the enzyme. In the second test conducted, the medium concentration enzyme was tested under the temperatures; 4°C, 23°C, 37°C, and 60°C. The measurements in this test got higher as the temperature got higher, but did the measurements under 4°C were overall significantly higher than the other temperature measurements. Lastly, the last test conducted showed that the measurements of the substance with 0 and 1 drop of hydroxylamine inhibitor went up, but the measurements of the enzyme with 5 drops of hydroxylamine inhibitor stayed rather low and did not change much. In conclusion, these experiments showed that chemical reaction rates are sped up with higher concentrations of enzyme, substrate,

Purpose How does temperature affect the solubility of salt in water? Hypothesis: If temperature affect the solubility of salt in water, then when tested the warm water will have a much greater solubility.

An experiment that explores how temperature is used to speed up a reaction rate is the use of light sticks or glow sticks. If a light stick is refrigerated, once the seal is broken, the reaction will slow down and the light stick gives off light for longer periods of time. If the glow stick is room temperature, the reaction will speed up and the light goes out faster. Heat can be used to speed up a reaction to see the reaction occur quickly. The more energy molecules have, the more they combine. Conversely, scientist often use ice water to slow down reactions. When molecules have less energy, it takes them longer to combine.

Enzymes are a protein that replicates a catalyst which helps chemical reactions begin to move without the enzymes being changed in the process. Enzymes work to complete only one task. But there are a variety of different enzymes in the body that each one has their specific task to complete. Something that enzymes do is they are used in making foods, used for digestion. Many of the chemical reactions in the body have a bunch of energy in them when they happen, which means it can occur in a faster amount of time. Enzymes speed up a reaction by lowering the activation energy. An inhibitor makes the reaction slow down. In this experiment we are testing how three factors affect a chemical reaction. We will be representing different objects or materials as the enzyme. We will use three objects or body part: a taped hand, a hand with a tennis ball in it, and a rendered hand. The importance of this experiment is to see how three different elements affect the chemical rate of a chemical reaction.

Marble, or calcium carbonate, is a fairly insoluble compound with the chemical formula CaCO3. This compound has a carbonate ion, which has a charge of -2 and a calcium ion, which has a charge of +2. Calcium carbonate has a few forms including chalk and limestone. The main use of these two materials is in the making of concrete, which is used for many things including buildings. The rate of the reaction is the speed that the reaction takes place; therefore, by measuring the rate, the amount of time the reaction takes will be measured. Hydrochloric acid is a stronger acid that is found in digestive juices in the human stomach and is also used for cleaning metals before they are coated. When you mix a strong acid like HCl with any carbonate you will have a chemical reaction in which CO2 gas is released. This means that it will fizz indicating a chemical reaction. These two elements can react with hydrochloric acid to yield carbon dioxide, calcium chloride and water. The chemical reaction equation for hydrochloric acid and calcium carbonate is:

Enzymes work best in a specific environment that is suitable for them, specifically at optimal

The surface temperature of a larger individual will increase more during exercise than that of a smaller individual. The purpose of this experiment is to demonstrate the idea that body size may possibly have a direct correlation with the change of temperature within the body. It’ll give insight to the question: Does body size really have an effect of the change of temperature? In order to test this theroy there needs to be a clear understanding of the components in the body that contribute to temperature. Those components are thermoregulation and thermoreceptors. Thermoregulation is the process that allows all humans to maintain their core internal temperature, this is designed to keep the body regulated as well as allowing the

6) The Bunsen burner will be lit using a match, put on the blue flame

Heat is a form of energy that is transferred between two substances at different temperatures. The flow of the energy is from the object of higher temperature to the object of lower temperature. The heat is measured in units of energy, usually calories or joules. Temperature on the other hand, is how cold or hot an object is. The temperature is the average kinetic energy per molecule of a substance. This is measured in degrees on the Celsius or Fahrenheit or in Kelvins.

This is a fair test because the only thing that is changed is the drop