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How surface area affects the rate of reaction experiment
Effect of surface area of potato on hydrogen peroxide catalysis
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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. I will keep the temperature the same
throughout all the experiments also I will keep the amount and
concentration of hydrogen peroxide the same, the amount of potato and
the same brand of potato. By doing this I will make it a fair test.
Prediction
I predict that the bigger the surface area the quicker the 10 cubic cm
of hydrogen peroxide gas will be produced. I think this because as the
surface area increases, the speed of the reaction will increase
therefore the gas will be produced faster. I believe this because most
chemical reactions happen faster when there is more of the reactant to
react with. When there is a larger surface area, there is more of the
reactant available, which makes it easier for them to react together.
Usually, when the surface area is doubled it will double the rate of
reaction.
Chemical reactions take place by chance. Particles need to collide
with enough velocity so that they react and interlock with each other,
this is called the lock and key theory. As the surface area is
increased the particles have a bigger surface to react with so more
molecules can react at a time. This means that they are colliding more
often and there is a bigger chance that the collisions have enough
velocity to cause a reaction. Since there are more collisions the
chemical reaction takes place faster.
What am I measuring?
I am measuring how long it takes to collect 10 cubic cm of gas in a
The Effect of Temperature on the Activity of the Enzyme Catalase Introduction: The catalase is added to hydrogen peroxide (H²0²), a vigorous reaction occurs and oxygen gas is evolved. This experiment investigates the effect of temperature on the rate at which the enzyme works by measuring the amount of oxygen evolved over a period of time. The experiment was carried out varying the temperature and recording the results. It was then repeated but we removed the catalase (potato) and added Lead Nitrate in its place, we again tested this experiment at two different temperatures and recorded the results. Once all the experiments were calculated, comparisons against two other groups were recorded.
Investigating the Effect of Substrate Concentration on Catalase Reaction. Planning -Aim : The aim of the experiment is to examine how the concentration of the substrate (Hydrogen Peroxide, H2O2) affects the rate of reaction. the enzyme (catalase).
Test tube A will have a piece of potato which is this size. Test tube
Catalase are an enzyme that catalyses the reduction of hydrogen peroxide into H2O and O2. Catalase are a common enzyme that can be found in almost all living organisms such as potatoes. It is specifically found in the cells that are exposed to oxygen and can be in a plant or animal cell. [1]
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
== == == = This is what I'm going to be changing in the experiment and this will be the temperature and the concentration of the yeast. There are several variables in this experiment, they are: · Amount Used - Too much or too little of the hydrogen peroxide causes the reaction to speed up/slow down producing different amounts of oxygen.
anyway) Note these factors affect the rate of the reaction, but not the final. amount of carbon dioxide produced). Why these factors affect it: higher temperature makes atoms move more. so they are more likely to bump into each other and react.
The reason I believe this is that chemical reactions occur when particles of the reacting substances collide. Increasing the number of the particles increases the number of collisions per second and this increases the reaction rate. In the reaction between hydrochloric acid and calcium carbonate you can increase the number of particles in two ways. The first of these is to increase the surface area of the calcium carbonate.
• An increase in the temperature of the system will increase the rate of reaction. Again, using the Maxwell-Boltzmann distribution diagram, we can see how the temperature affects the reaction rate by seeing that an increase in temperature increases the average amount of energy of the reacting particles, thus giving more particles sufficient energy to react.
Abstract: Enzymes are catalysts therefore we can state that they work to start a reaction or speed it up. The chemical transformed due to the enzyme (catalase) is known as the substrate. In this lab the chemical used was hydrogen peroxide because it can be broken down by catalase. The substrate in this lab would be hydrogen peroxide and the enzymes used will be catalase which is found in both potatoes and liver. This substrate will fill the active sites on the enzyme and the reaction will vary based on the concentration of both and the different factors in the experiment. Students placed either liver or potatoes in test tubes with the substrate and observed them at different temperatures as well as with different concentrations of the substrate. Upon reviewing observations, it can be concluded that liver contains the greater amount of catalase as its rates of reaction were greater than that of the potato.
* Amount of sugar solution in each test tube. * The potatoes have to have the same mass.
How the Concentration of the Substrate Affects the Reaction in the Catalase Inside Potato Cells Introduction Enzymes are 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 I am going to find out how the concentration of the substrate, hydrogen peroxide affects the reaction in the catalase inside the potato cells.
In essence, the main objective was to use chemical titration to measure and then calculate the rate of conversion of hydrogen peroxide (H2O2) to water and oxygen by using the enzyme catalase. Other purposes of the lab were; to measure the effects of changes of temperature, pH, enzymes concentration, and substrate concentration on rates of an enzyme. The lab was also an opportunity to see a catalyzed reaction in a controlled experiment. And the last objective was to learn how environmental factors affect the rate of enzyme catalyzed reactions.
From this rudimentary description of the production of potato chips, one can see that the main ingredients include potatoes, oil, and some salt. However, what may not be so apparent are the “non-ingredient” inp...
We have no gases and solids involved, therefore it is easy to deal with solutions. Similarly, the use of a catalyst complicates things, and if used incorrectly could alter the outcome of the experiment. The theory behind this experiment is that increasing the concentration can increase the rate of the reaction by increasing the rate of molecular collisions. GRAPH I will place the reaction mixture on a paper with a black cross drawn on it. When the cross is completely obscured, the reaction will be finished.