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The effect of temperature on reaction rate
Effects of temperature on rate of reaction
The effect of temperature on reaction rate
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The Effects of Concentration on Reaction Rate with Sodium Thiosulphate
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Planning
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In this experiment I shall be varying the volume of sodium
thiosulphate, hydrochloric acid and water, and measuring the reaction
rate. When I increase the amount of sodium thiosulphate with less
water, I think the time for the cross to disappear would be faster
than there would be with little sodium thiosulphate and more water –
taking in account the amount of hydrochloric acid is the same.
The reason why I think this is because the particles in the solution
that will collide. There is a theory called the collision theory, and
some of the factors from this, may affect the reaction rate in my
experiment.
The first factor is the concentration. The concentration rate is
decided whether how strong the solution is. For an example, if there
is a lot of hydrochloric acid, and sodium thiosulphate, then there is
a high chance that the reactions will occur. If there is a solution
that is neutral, it would slow down the process of the reaction.
The second factor is the size of the particles. If there is a large
particle with a large surface area, and many small particles, the
smaller particles have a higher chance of colliding with the larger
particles. However, if there are small particles, and small particles
of another compound, then the reaction rate would be slower, because
the particles wouldn’t collide as easily as they would with particles
of a bigger size.
The third factor that affects collisions is the temperature. If there
is a higher temperature, then the particles are able to move freer and
faster, than they would if the temperature was lower. This means that
the reaction rate would be faster, because the collisions of the
particles are more frequent.
The fourth factor is to add a catalyst, but in this experiment we did
not add a catalyst.
Knowing the collision theory, it makes my predictions clearer with
what is going to happen when the experiment will take place.
Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either increasing it or decreasing it. These were considered and controlled so that they did not disrupt the success of the experiment. Temperature-
How am I going to make it a fair test I will use a clean flask for
It is important however to note that the NH4 and K ions are still in
The aim is to find out if changing the concentration of the hydrochloric acid solution has an effect on the time taken for the reaction. The reaction that will take place is: Hydrochloric acid + Calcium Carbonate + Calcium Chloride + Water + Carbon dioxide 2HCl (aq) + CaCo3 (s) CaCL2 (aq) + H2O + CO2 (g). Collision theory - Collisions between reactant particles are needed. for the reaction to take place in order to form a product.
from 10cm to 50cm to make it easier to see the difference in a graph.
However, in order to measure the rates of reaction, sodium thiosulphate and starch are added. Sodium thiosulphate is added to react with a certain amount of iodine as it is made. Without the thiosulphate, the solution would turn blue/black immediately, due to the iodine and starch. The thiosulphate ions allow the rate of reaction to be determined by delaying the reaction so that it is practical to measure the time it takes for the iodine to react with the thiosulphate. After the all the thiosulphate has reacted with the iodine, the free iodine displays a dark blue/black colour with the starch. If t is the time for the blue/black colour to appear, then 1/t is a measure of the initial rate.
By analysing the results it could be seen that there was a relationship between the concentration of sodium thiosulfate and the time take for the cross to be no longer visible on the white tile through the solution. From graph 1 it could be seen that the concentration of sodium thiosulfate and the time taken for the reaction to be completed are inversely proportional, as when the concentration of sodium thiosulfate increases, the time taken decreases and the graph levels out as it approached the x-axis. Graph 2 supports this by showing that the concentration of sodium thiosulfate and the rate of the reaction share a linear relationship, meaning that the concentration is directly proportional to the inverse of the time taken.
My aim in this piece of work is to see the effect of temperature on the rate of a reaction in a solution of hydrochloric acid containing sodium thiosulphate.
This obviously increases the number of collisions, too.. [ IMAGE] Faster collisions increase the rate of reaction. High temperatures also increase the energy of the collision, because it makes all the particles move faster. Faster collisions are only caused by increasing the temperature. Reactions only happen if the particles collide with enough energy.
The temperature at which the reaction is carried out Use of a catalyst Reaction equation is mentioned above but rate equation can only be decided by doing experiments. So, the following procedure can be used to carry out the experiment. Plan Equipment 2 Measuring cylinders Beaker Stopwatch Paper with black cross on it Sodium Thiosulphate (different concentrations) Hydrochloric acid (same concentration each time) Water (different concentrations) Pipette. Prediction I predict that the greater the concentration of sodium thiosulphate solution, the faster the chemical reaction will take place.
The aim of my investigation is to find out whether the increase of temperature increases the rate of reaction between the two reactants of Sodium Thiosulphate and Hydrochloric acid. I will then find out and evaluate on how temperature affects this particular reaction. Factors There are four main factors, which affect the rate of reaction that are considered as variables for the experiment I will be doing, they are the following: Molecules can only collide when two of them meet together.
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid Introduction Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence the rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects reaction rate because when the surface area of a reactant is increased, more particles are exposed to the other reactant.
a bigger one so I can fit the cross under it and also be able to pour
Rate of reaction is the speed of reaction. In essays written by young scientists, they have used concentration as variable in their experiments; some have used a light sensor. connected to a data logger, to measure the amount of light passing. through the "cloudy" liquid. 1 moles = 6.02 1023 The particles in the hydrochloric acid and sodium thiosulphate need to
The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid