Rate Of Reaction Sodium Thiosulfate
The Effect of Different Concentrations of HCl on the Rate of Reaction Between HCl and Sodium Thiosulfate
Chemistry Lab report
Aim: The aim of this experiment is to determine how concentrations of HCl acid affect the rate of reaction when reacted with Sodium Thiosulfate (Na2S2O3). This experiment would require measuring the mass of the reaction over a period of time to be able to determine the rate of the reaction.
Safety Precautions: In this experiment, SO2 gas is produced from the reaction between Sodium Thiosulfate and HCl, and this can be dangerous if inhaled or is in contact with the skin or eyes, which caused irritation. So it is advised to wear safety goggles and to do the experiment near a window and avoid breathing in the gas produced by this experiment. Also, gloves should be worn to prevent the skin irritation, and a lab coat.
Research Question: How do different concentrations of HCl affect the rate of the reaction (determined by the change in mass) between Sodium Thiosulfate and HCl, when Sodium Thiosulfate is in excess?
Background Information: The concentration of a reactant is one of the factors that affect the rate of a reaction. It is said that an increase in the concentration of the reactants increases the rate of the reaction because (based on the collision theory) there are more frequent and possible collisions that take place between reactants, as there are more reactants present. Therefore a higher concentration would cause an increase in the frequency of collisions that would increase the chances of more successful collisions, which may increase the rate of the reaction (as visible in figure 1). The following chemical equation shows the reaction between sodium thiosulfate and HCl: Na2S2O3 (s) + 2HCl (aq) 2NaCl (aq) + S (s) + SO2 (g) + H2O (l)
Since sulfur dioxide is given off as a gas in this reaction, this would suggest that the mass of the reaction would reduce, which can be used in order to measure the rate of the reaction.
Figure
Chemistry Lab report
Aim: The aim of this experiment is to determine how concentrations of HCl acid affect the rate of reaction when reacted with Sodium Thiosulfate (Na2S2O3). This experiment would require measuring the mass of the reaction over a period of time to be able to determine the rate of the reaction.
Safety Precautions: In this experiment, SO2 gas is produced from the reaction between Sodium Thiosulfate and HCl, and this can be dangerous if inhaled or is in contact with the skin or eyes, which caused irritation. So it is advised to wear safety goggles and to do the experiment near a window and avoid breathing in the gas produced by this experiment. Also, gloves should be worn to prevent the skin irritation, and a lab coat.
Research Question: How do different concentrations of HCl affect the rate of the reaction (determined by the change in mass) between Sodium Thiosulfate and HCl, when Sodium Thiosulfate is in excess?
Background Information: The concentration of a reactant is one of the factors that affect the rate of a reaction. It is said that an increase in the concentration of the reactants increases the rate of the reaction because (based on the collision theory) there are more frequent and possible collisions that take place between reactants, as there are more reactants present. Therefore a higher concentration would cause an increase in the frequency of collisions that would increase the chances of more successful collisions, which may increase the rate of the reaction (as visible in figure 1). The following chemical equation shows the reaction between sodium thiosulfate and HCl: Na2S2O3 (s) + 2HCl (aq) 2NaCl (aq) + S (s) + SO2 (g) + H2O (l)
Since sulfur dioxide is given off as a gas in this reaction, this would suggest that the mass of the reaction would reduce, which can be used in order to measure the rate of the reaction.
Figure