Investigating the reaction Between Sodium Thiosulphate (Na2S2 O3) and Hydrochloric acid (HCl)
Aim
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I am investigating the rate of reaction between Hydrochloric acid
(HCl) and Sodium Thiosulphate (Na2S2O3), when Na2S2O3 is mixed with
water (H20).
Background Knowledge
The rate of a reaction can be speeded up by increasing the
temperature; at a higher temperature the particles move faster and
collide more often, as a result of this the reaction speeds up.
Increasing the concentration of reactants in water will also speed up
the reaction, as there are more reactive particles in the same volume
and therefore more chance of a reaction taking place, which speeds up
the reaction. This is shown in the diagrams below.
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Sulphuric acid (H2SO4)
Water (H2O)
Sodium Carbonate (Na2CO3)
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High Conc. Of Na2CO3
Text Box: Low Conc. Of Na2CO3
These diagrams are from a previous experiment with Sulphuric acid and
Sodium Carbonate.
Breaking up solids into smaller pieces increases the rate of reaction,
as this increases the surface area of the reactant, therefore there is
a larger area for reaction to take place.
However this is not relevant for my investigation as I am only using
liquids, not solids. Also using a catalyst will increase the rate of
reaction, but this is also not relevant for my investigation, as I am
not using any catalysts.
Prediction
I predict that as the concentration of Sodium Thiosulphate (Na2S2O3)
is increased, the rate of reaction will also increase.
I think this is because as the Na2S2O3 concentration is increased it
will react more quickly with the Hydrochloric acid (HCl) as it is more
concentrated so there are more Na2S2O3 particles and therefore more
chance of a Na2S2O3 particle to collide with a HCl particle creating a
reaction and this results in the solution becoming cloudy quicker as
the sulphur is precipitated, as the time taken for the sulphur to go
reaction is the rate of loss of a reactant or the rate of formation of
Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction
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 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.
Text Box: Prediction I predict that as I increase the amount of chips the rate of reaction will increase because as the nuber of chips increases so does the surface area. Collision theory tells us that if the surface area of one of the reactants is increased then the reaction will speed up. This is because the acid particles have greater surface area to react with. This in turn means more carbon dioxide is produced.
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.
Reaction Between Hydrochloric Acid and Sodium Thiosulphate Introduction I will be conducting two experiments to determine how two factors affect the rate of reaction in the reaction between hydrochloric acid and sodium thiosulphate. It is a precipitation experiment. The equation allows us to see how this experiment will help us find how rate of reaction changes Sodium thiosulphate + Hydrochloric acid ---- Sodium chloride + Sulphur + Sulphur dioxide + Water Na2S2O3 (aq) + 2HCl(aq) ---- 2NaCl(aq) + S(s) + SO2(g) + H2O(l) The main factors that affect the rate of reaction of any experiment are -Pressure.
from 10cm to 50cm to make it easier to see the difference in a graph.
· I know that the line will not go through the origin because at 0˚C
Aim: - the aim of this experiment is to show the effect on the rate of
1. The labels have fallen off of three bottles thought to contain hydrochloric acid, or sodium chloride solution, or sodium hydroxide solution. Describe a simple experiment which would allow you to determine which bottle contains which solution.
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.
I am to investigate the factors that affect the rate at which Sodium Thiosulfate (Na2S2O3) reacts with Hydrochloric Acid (HCl). When sodium thiosulfate is mixed with hydrochloric acid, a reaction takes place, leading to a precipitate of sulphur being formed. This turns the solution cloudy. I shall use this clouding to investigate a factor that affects the rate of reaction, the factor being temperature. To do this, I shall react Sodium Thiosulfate with Hydrochloric Acid at a range of temperatures, between 20°C and 40°C, at 5°C intervals, leading to 5 results.
known as a SLOW reaction, and as a result is known to have a LOW rate
To find out the effect of concentration on rates of reaction using Sodium Thiosulphate. and Hydrochloric Acid. The purpose of the experiment is to see how different volumes of Hydrochloric Acid affect the rate of reaction. The reaction, which produces solid Sulfur, it will then be followed by measuring the time needed for the reaction to become opaque/cloudy.