Sodium Thiosulphate's Effect on the Rate of Reaction with Hydrochloric Acid Aim:
I am going to investigate how varying the concentration of Sodium
Thiosulphate affects the rate of reaction with Hydrochloric Acid.
Prediction:
The equation for the reaction is:
[IMAGE]
Sodium Thiosulphate + Hydrochloric Acid Sodium Chloride + Water +
Sulphur + Sulphur dioxide
[IMAGE]
Or: Na2S2O3 + 2HCl S + 2NaCl + H2O + SO2
This reaction has a definite end point (when the cross on the test
tube 'disappears'). The faster the cross 'disappears' the faster the
reaction and by timing how long this takes we can establish the rate
of reaction.
There are various factors affecting the rate of reaction that we need
to take into consideration, these are:
b Temperature - I will conduct all the tests at room temperature
(hopefully on the same day) because temperature has an effect on the
rate of the reaction.
b Shaking or stirring - I will try to keep jogging of the solutions to
a minimum so as not to alter the rate of reaction.
b Catalysts speed up reactions.
I predict that the greater the concentration of Sodium Thiosulphate
(hypo) in the solution the faster the chemical reaction will take
place. Therefore, the cross will disappear more quickly due to the
cloudiness of the solution. But only up to a point after this the
solution will not react within a reasonable time (i.e. under 30 min).
On a graph I predict it would be a plateau.
I think that the concentration of a solution effects 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 for a given volume than a more dilute
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-
The sand is If the water with Alka-Seltzer tablets is stirred during the reaction, then the rates of reactions will increase because the particles will be forced to make contact with each other and... ... middle of paper ... ...results anomalies because they are the outcome of dissociation of calcium and magnesium ions,. Evaluation: What is the difference between My results were very reliable, because by looking at my graphs I can see a trend that relates to my scientific background. It is also evident that I have obtained a reliable set of results when I see that.
The rate law determines how the speed of a reaction occurs, thus allowing the study of the overall mechanism formation in reactions. In the general form of the rate law, it is A + B C or r=k[A]x[B]y. The rate of reaction can be affected by the concentrations such as A and B in the previous equation, order of reactions, and the rate constant with each species in an overall chemical reaction. As a result, the rate law must be determined experimentally. In general, in a multi-step reaction, there will be one reaction that is slower than the others.
The Effect of Temperature on the Rate of Reaction Between Hydrochloric Acid and Calcium Carbonate
The Effect of Concentration of Hydrochloric Acid on the Rate of Reaction with Magnesium Aim: To investigate the effect of concentration of hydrochloric acid on the rate of reaction with magnesium Prediction: As the concentration of the hydrochloric acid increases, so will the rate of reaction Hypothesis: In a reaction, particles of two different reactants react together to form a product. The reaction only takes place on account of two things, if the particles collide, and if the collision has enough 'activation energy'. The two reactant particles, in this case magnesium particles and hydrochloric acid particles, must collide with each other on the correct 'collision course'. If this does not occur then no chemical reaction will take place. The reaction must also have enough energy, this can be affected by temperature, the more heat the particles have the faster they move and so the more energy therefore more chance of successful collisions.
from 10cm to 50cm to make it easier to see the difference in a graph.
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
The rate equation is in terms of concentration over time and the reaction rate compares the increase/decrease
While measuring the effect of the use of a catalyst and temperature on the reaction rate, several factors must be kept constant. During the reaction with a catalyst, the temperature will be kept constant (at room temperature), concentration, pressure and since the reaction involves liquids, the surface area will be kept constant at all times, however they must be mixed the same.
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 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.
Ties and hair should be tucked out of the way, so they do not make contact with any of the chemicals. It would also be preferable to wear a scientific apron, however this is not essential. We should also try our best not to spill any chemicals, and we must not eat or drink in the lab while dealing with these harmful chemicals, as they can get on our hands. Fair Test To make this experiment a fair test, we need to make sure we do a number of things. In this experiment we are trying to find the rate of reaction using concentration as a factor, so there are a number of things we need to make sure we do to keep it a fair test.
Effect of Temperature on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Investigation Chemical reactions are used in our everyday life, they literally keep us alive. They are used in food, respiration and everywhere else in the environment. A chemical reaction mainly occurs when reactants react together to produce a new product. The speed at which this reaction takes place is called the rate of reaction. The product produced has a number of particles in the solution that has formed from the reactants.
Investigating How the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Calcium Carbonate
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