Introduction:
In the investigation I am going to see how long it takes for sodium thiosulphate to react with hydrochloric acid, the sodium thiosulphate will be diluted with water, I will do this by having 60 ml sodium thiosulphate and 40 ml water but each time I will change the amount of sodium thiosulphate and water but they will both add up to equal 100ml, I will know when the reaction has taken place because the beaker with the chemicals in will go cloudy, we will put the beaker on a piece of paper with a x on it. When the beaker goes cloudy the x will disappear and that is when I will stop the time and record my results on a table, I will repeat this for each time that I do the experiment.
Collision theory:
Particles can only react if they collide with enough energy for a reaction, this is called the collision theory there are four factors that can change the rate of a chemical reaction between particles these are: temperature, energy, surface area and the use of a suitable concentration. Increasing the temperature will cause the particles to move faster and with more energy this will speed up the reaction because the particles will collide more often. Increasing the concentration of the reactant means that there are more particles in the reaction so there will be more collisions. Using a powder instead of a solid means the concentration is greater which means there is a greater area of the reaction so the particles can move faster.
Word equations:
Na2 So3 + 2HCI = 2Na C1 + H2O + So2 +S
Sodium thiosulphate + hydrochloric acrid = sodium chloride + water +
Sulphur dioxide + sulphur
Equipment:
Beaker:
P...
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...r that the solution is in to go cloudy. I could of improved my experiment by doing all of the tests on the same day, this would help the test be more fair as the room temperature would be the same and would not alter the results of the experiment. I could of also instead of using a peice of paper with a x on it used a single beam of light that would go through the solution and then when the beaker went cloudy then i would no longer of been able to see the light, i could also have put a light sensor above the beaker so that when the light stops coming through the solution then it would stop the stopwatch automaticly. This would result in my test being more accurate as as soon as the light stops coming through the time would stop without delay but with doing this manualy there would of been a small ammount of time that would pass before the stopwatch could be stoped.
the replicate shows the same trend as the first experiment. I used a measuring cylinder and a beaker to measure out the amounts of water; however these did not seem to affect the quality of my results. To increase the accuracy of my results I could have perhaps used a burette. Even though I did the best I could to keep the experiment accurate, I did. some places there were mistakes that unintentionally occurred.
Hydrochloric Acid, Sodium Thiosulphate Reaction. Research: What is the difference between Hydrochloric acid is a strong colourless acid formed when hydrogen chloride gas dissociates in water, used in industrial and laboratory. processes. The.
For this experiment, you will add the measured amount of the first sample to the measured amount of the second sample into its respectively labeled test tube then observe if a reaction occurs. In your Data Table, record the samples added to each test tube, describe the reaction observed, if any, and whether or not a chemical reaction took place.
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
Then, repeat steps 7-11 another 4 times but with the room temperature water. For the room temperature water just leave it in the room but try not to change the room’s temperature. 15. Try to put all your recorded data into a table for organization 16. Repeat the entire experiment for more reliable data.
The rate at which Alka-Seltzer tablets reacts with water Statement of problem The aim of the experiment is to find out the rate at which Alka-Seltzer tablets react with water. The input variable that I will change is temperature. The output variable will be measured by the time it takes for the Alka-Seltzer tablets to dissolve.
Record any observations made. (A clear positive reaction for the 2% glucose control and a clear negative reaction for the water control should be seen).
The number and strength of collisions is increased so that the reaction can happen faster than it should. If the particles have more energy then more particles will be able to react to it. Solid reactants like marble chips are affected by surface area. The larger the surface area, the more collisions that will take place.
the reaction; if it speeds it up, slows it down or changes it in any
• The use of a catalyst will speed up the reaction as long as the catalysts electrode potentials are feasible for each step in the reaction. Since a catalyst lowers the activation energy and takes the reaction through a different route, according to the Maxwell-Boltzmann diagram, at a constant temperature more particles are able to react as demonstrated by the diagrams below:
This meeting between the two particles can only take place on the surface area of the material. If the surface area of the material is increased, the particles gather more space to collide with each other with force. With a large surface area, the particles will have more area to work on so the collision probability will be high. A catalyst is a separate substance to the ones you use in your experiment and is used to speed up the reaction between the reactants.
a bigger one so I can fit the cross under it and also be able to pour
from 10cm to 50cm to make it easier to see the difference in a graph.
And the symbol equation for it is:. Na2S2O3 + 2HCl, S + SO2 + 2Na + H2O. Before conducting my experiment, I will research into, amongst other things, the factors that affect the rate of a reaction. This is so that I may have enough information to understand the effect of temperature on the rate of a reaction and also gain appropriate understanding to make a suitable prediction as to what the outcome of my experiment will be. Reactions occur when the particles of reactants collide together continuously.
Only particles with enough energy to overcome the barrier will react after colliding. The minimum energy that a particle must have to overcome the barrier is called the activation energy, or Ea. The size of this activation energy is different for different reactions. I think that the concentration of a solution affects the rate of reaction because the rate of reaction depends on how frequently the molecules of the reacting substances collide. A more concentrated substance has more molecules at a given volume than a more dilute substance.