Purpose
To investigate the effect of temperature on the rate of the thiosulphate reaction.
Hypothesis
If the temperature increases, then the rate of the thiosulphate reaction will also increase.
Variables
Independent variable: Temperature change in each experiment, which will be varied by increasing the temperature by 10°C each time.
Dependent Variable: Rate of reaction, which will be measured by measuring the time taken for the cross to not be visible.
Constants:
Concentration of HCl and Na2S2O3 was kept constant as this would ensure that there was no variability or fluctuation in the reaction rate due to varying concentration Same measuring equipment was used throughout the experiment to maintain consistency among the experimentations, and that there are no fluctuations or inconsistencies …show more content…
The rate of reaction varies from 22.20 S/1 to 102.14 S/1. From the results it can be deduced that as the temperature of Na2S2O3 increases, the rate of reaction also increases. No obvious outliers are present in these results, indicating high precision in the results.
To distinguish the strength between the two variables (the temperature of Na2S2O3 in the water baths and the average time taken for the cross to be invisible), the coefficient of determination can be found (r^2). This is simply the square of the correlation coefficient (r). If the sign of the r value is negative (-) it is a negative correlation and if it is positive (+) then there is a positive correlation.
The table below shows the strength of the descriptor at various vales of r^2.
Value Strength of descriptor r^2=0 No correlation
0<1 Very strong correlation r^2=1 Perfect
To investigate the effect of temperature on the rate of the thiosulphate reaction.
Hypothesis
If the temperature increases, then the rate of the thiosulphate reaction will also increase.
Variables
Independent variable: Temperature change in each experiment, which will be varied by increasing the temperature by 10°C each time.
Dependent Variable: Rate of reaction, which will be measured by measuring the time taken for the cross to not be visible.
Constants:
Concentration of HCl and Na2S2O3 was kept constant as this would ensure that there was no variability or fluctuation in the reaction rate due to varying concentration Same measuring equipment was used throughout the experiment to maintain consistency among the experimentations, and that there are no fluctuations or inconsistencies …show more content…
The rate of reaction varies from 22.20 S/1 to 102.14 S/1. From the results it can be deduced that as the temperature of Na2S2O3 increases, the rate of reaction also increases. No obvious outliers are present in these results, indicating high precision in the results.
To distinguish the strength between the two variables (the temperature of Na2S2O3 in the water baths and the average time taken for the cross to be invisible), the coefficient of determination can be found (r^2). This is simply the square of the correlation coefficient (r). If the sign of the r value is negative (-) it is a negative correlation and if it is positive (+) then there is a positive correlation.
The table below shows the strength of the descriptor at various vales of r^2.
Value Strength of descriptor r^2=0 No correlation
0<1 Very strong correlation r^2=1 Perfect