Safety glasses should be worn. The test tube will immediately have a one-hole stopper placed onto it, with a glass bend and tubing coming out of the stopper. This is a polynomial relationship, which implies that the rate of reaction increases exponentially in relation to the increase in temperature.
It showed that temperature and rate of reaction increase proportionally due to a greater number of collisions. If the demonstration is performed in a small room, make sure to use a safety shield between the class and the demonstration area. Students will explore this in the inquiry lab.
Students will need to write up their conclusions in their lab book. In the past, students were told what exactly they should use as their independent variable in the reaction. Before entering the lab area, students should first write up some hypotheses as to what they think may affect the rate of the reaction in their lab books.
The lycopodium powder will then be allowed to fall down in dust format onto the flame, and a ball of flame will be produced. In order to avoid this problem, the reaction should be conducted in a closed room with a stable room temperature. They should collect data to show if their hypotheses are correct or not.
Another factor that could have affected the accuracy is the fluctuation in room temperature during this experiment. Although the experiment was successful in showing the relationship discussed above, there are a few errors associated with this experiment that could have hindered the accuracy of the results.
Thus, this light could have increased the energy of the particles participating in the reaction, and thus increase the inaccuracy because this is an external factor affecting the rate of reaction.
It will be explained that the faster the carbon dioxide gas is produced, the faster the bromothymol blue and water mixture will turn to the color yellow. From here students will observe a demonstration involving lycopodium powder to illustrate that the rate of a chemical reaction can vary.
Furthermore, some reactions can be sped up depending on how much light they are exposed to. It is intended for use in a 9th grade Physical Science class of roughly 28 students. They will then construct a data table to collect data in for their given hypotheses.
Product Context for Use This activity is a lab meant to introduce students to the factors which affect the rate of a chemical reaction.
They will be asked to write down what they will hold constant for each hypothesis that they test, as well as what they will change, and what they will measure. Students will observe that over an amount of time the water and bromothymol blue beaker changes to the color yellow when the carbon dioxide gas produced by the alka-seltzer and HCl bubbles through it.
Now students need to discover that surface area is a factor influencing the reaction rate on their own. To begin with, a beaker will be filled with ml of water and 10 drops of bromothymol blue and stirred.
This allows for greater error as each time something is measured there is an error associated with the piece of equipment used. Temperature of HCl vs.
However, in regards to specific rates of reaction, they affect the accuracy. This could have increased or decreased the temperature of the HCl during the reaction. This experiment was performed in an open classroom with bright lights and open windows.
Students will have explored what a chemical reaction is, the collision theory of chemical reactions, possible observations that lead one to believe a chemical reaction has occurred, types of chemical reactions, balancing of chemical equations to show conservation of mass, and determining the products of a chemical reaction given the reactants.
I have never actually carried out this activity using this inquiry based method. This could have been avoided by making a large amount of the HCl in the desired concentration at the beginning of the experiment. I will monitor their progress, seeing what kind of conclusions the students obtain.
The Kinetic Molecular Theory states that temperature is a measure of average kinetic energy of the particles Thus, Due to the increase in temperature the average kinetic energy of the particles increases proportionally thus resulting in higher overall entropy.
Rate of Reaction Graph 1 shows the relationship between change in temperature and the rate of reaction. Various materials, including those listed in the materials section will be provided for the students, or be on hand if asked for by the students.
The students will be told that no new reactants were introduced Students will turn in their collected data in a lab write-up, where they will summarize their findings. When a flame source is brought into contact with a pile of lycopodium powder, no noticeable effect is observed.
A handout explaining the lab will be distributed. One factor that could have affected the accuracy of this experiment is the fact that each solution of HCl was diluted separately.
A tablet of alka-seltzer will then be placed into the test tube. To complete the lab it is necessary to have access to hydrochloric acid, bromothymol blue, mortar and pestles, and a classroom set of one-hole stoppers outfitted with a glass bend attached to a small length of tubing in the hole.The rate of a reaction is the speed in which a chemical reaction occurs.
Concentration is my main focus within rates of reaction as I aim to find out how the different concentrations effect how slowly or quickly a reaction takes place. - Investigating Factors that Affect the Rate of Reaction Between a Metal and an Acid Factors that may affect the experiment + fair test The variables that could affect the rate of reaction are the temperature, amount of magnesium, concentration of acid, surface area of magnesium and volume of acid.
- The Affect of Changing the Concentration on the Rate of Reaction To find out the affect of changing the concentration on the rate of reaction Scientific background Collision theory: Collision theory explains how chemical reactions occur and.
Lab Investigation: Factors that Affect Reaction Rate. Introduction: You may have noticed that chemical reactions occur at different rates. The explosion of fireworks is instantaneous; the rusting of an iron gate is relatively slow. A. rate. is measure of change per unit time. For example, the rate of change of distance over time is called speed.
There are several factors that can influence chemical reaction rate. In general, a factor that increases the number of collisions between particles will increase the reaction rate and a factor that decreases the number of collisions between particles will decrease the chemical reaction rate.
Chemistry coursework: An investigation of the affect of the concentration an of the rate of reaction. Introduction. We are trying to find out the affect of acid concentration on the rate of reaction, we are using 2,1,Molar acid/5(11).Download