In this investigation we will be trying to find out whether the temperature of the reactants affects the final reaction. In this investigation we will be using Sodium Thiosulphate and Hydrochloric Acid

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Kamran Ali 11.1                     Rates Of Reaction

Rates Of Reaction

Introduction:

In this investigation we will be trying to find out whether the temperature of the reactants affects the final reaction. In this investigation we will be using Sodium Thiosulphate and Hydrochloric Acid. We will be testing to see how quickly the products of the reaction turn opaque. To establish the opacity we will place the conical flask on a big black “X” mark on a piece of paper. We will be timing (with a stopwatch) to see how long it takes after mixing the reactants until we cannot see the X mark on the paper.

Aim:

The primary and only aim of this experiment is to establish whether or not the temperature of the reactants in a reaction affects the speed of the reaction.

Prediction:

I predict that a reaction taken place with reactants at a higher temperature will result in a faster reaction.


Hypothesis:

This is because the molecules in the 2 reactants will react themselves but at a higher temperature they are moving around faster and harder so a reaction is more likely to happen. As the reactants will be moving harder as well as faster; there will be a higher percentage of particles that will meet the minimum activation energy required to create a reaction between 2 molecules. And since the molecules will be moving around so much more there is a higher probability of hitting other molecules due to more collisions taking place.

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                   Low Temperature                                        High Temperature

                         

The reaction between Hydrochloric Acid and Sodium Thiosulphate is:

Na2S2O3 + 2HCl → 2NaCl + SO2 + H2O + S

As you can observe; this equation is already balanced; there is no need to balance it. The reason an equation needs to be balanced is to see how many of each atoms/molecules ...

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