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. By reducing the volume in which the same amount of
particles exists the pressure is increased. Once the same number of
particles is in a smaller area there is less space in which to move
and so the particles are more likely to collide each other.
Using a catalyst is another method I could use. A catalyst is a
substance, which lowers the activation energy of a reaction without
being chemically altered.
Energy. By giving the particles extra energy, as heat, they will move
faster. This means that they cover more ground and are therefore more
likely to collide with each other which in turn makes the reaction
faster. (We have to take into consideration the face that not all
collisions are successful as they may not react with the amount of
energy required (activation energy)). The best way to give energy to a
reaction is heat.
Concentration. Just as increasing the pressure will increase the
number of particles colliding, so will the concentration. By putting
more particles into the reaction, the chance that they collide is
increased, thus increasing the rate of reaction.
Surface area. Particles can only collide when the two sorts can meet.
Therefore a reaction can only occur on the surface of a material.
Therefore by increasing the surface area (e.g. cutting the substances)
of the material, which is available to collide, the speed of the
reaction will increase.
In my experiment I will be investigating two factors, the
have either not stir the mixture or use a machine to stir it at the
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.
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 there is therefore more chance of successful in the collisions.
Experiment is to investigate the rate of reaction between hydrochloric acid and calcium carbonate Hydrochloric acid + Calcium Carbonate Þ Calcium Chloride + Water + Carbon Dioxide 2HCl (aq) CaCo3 (s) CaCl2(s) H2O (aq) CO2 (g) There are a number of variables in this experiment and these are listed below as input variables and outcome variables.
from 10cm to 50cm to make it easier to see the difference in a graph.
As the pressure drop increases in the column, it is observed that the degree of foaming becomes more violent and more spread out. When the pressure drop is relatively high, it means that the pressure exerted by the vapour is insufficient to hold up the liquid in the tray, causing the gas bubbles to appear on top of the sieve trays. To add on, the higher the pressure drop, the higher the velocity of the vapour passing up the column. As a result, more vapour will penetrate the liquid and more bubbles formation is observed. Due to more bubbles formation, the degree of foaming are more agitated, rapid and spread out.
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
take about 30 minutes for the water to cool down 20ºC, which is why I
My aim in this piece of work is to see the effect of temperature on the rate of reaction in a solution of hydrochloric acid containing sodium thiosulphate. The word equation for the reaction that will occur in the experiment is: Sodium thiosulphate + hydrochloric acid →, sulphur + sulphur dioxide +. sodium chloride + water ? where the sulphur is an insoluble precipitate.
The Effect of Sodium Thiosulphate Solution on the Rate of its Reaction with Hydrochloric Acid
Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid. Aim Investigation, to find out how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by changing the concentration. Introduction I must produce a piece of coursework investigating the rate of reaction, and the effect different changes have on them. The rate of reaction is the rate of loss of a reactant, or the rate of development of a product during a chemical reaction. It is measured by dividing 1 by the time taken for the reaction to take place.
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.
This hypothesis is based on the collision theory, which states that when particles are heated up, they have more kinetic energy. With this high amount of energy, the particles will move at a higher rate with more force, when these particles collide a reaction occurs, therefore increasing the heat increases the reaction rate. The volume and the mass of the MgCl2 formed could have been measured and weighed after the reaction and that value would have been very useful because if it was obtained, it would be easier to manually calculate the theoretical yield of H2 gas rather than using a theoretical value found online. This would have made the percentage yield more accurate.
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 rate of reaction is how quickly or slowly reactants in chemical reactants turn into products. A low reaction rate is when the reaction takes a long time to take place; hence, a reaction that occurs quickly has a high reaction rate. A rate refers to how slow or quick the product is produced. It is possible to control the rate of chemical reactions and speed up or slow down the rate of chemical reactions by altering three main factors which are temperature, concentration and the surface area. When the temperature of the reactants increases, the molecules vibrate at a more intense speed therefore colliding with each other more frequently and with increased energy resulting in a greater rate of reaction. Accordingly, as the temperature decreases the molecules will move slower, colliding less frequently and with decreased energy resulting in the rate of reaction decreasing. Concentration is how much solute is dissolved into a solution and is also a factor that affects the rate of reaction. When the concentration is greater this means there is an increased amount of reactant atoms and molecules resulting in a higher chance that collisions between molecules will occur. A higher collision rate means a higher reaction rate. Consequently at lower concentrations there are reduced chances of the molecules colliding resulting in a lower reaction rate. The measurement of how much an area of a solid is exposed is called the surface area. The quicker a reaction will occur the more finely divided the solid is. For example, a powdered solid will usually have a greater rate of reaction in comparison to a solid lump that contains the same mass for it has a lower surface area than the powdered solid.