The rate of the reaction between sodium thiosulphate and hydrochloric acid.

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Connie Au Year10  44335

The rate of the reaction between sodium thiosulphate and hydrochloric acid

Introduction

  In this experiment, I will use sodium thiosulphate plus hydrochloric acid to see how the rate of reaction change, by heat the sodium thiosulphate before add the acid. The equation of sodium thiosulphate plus hydrochloric acid is :

Sodium thiosulphate+Hydrochloric acid

Sulphur + Sodium chloride + Sulphur dioxide + Water

Aim

  To see how temperature affects the rate of the reaction between sodium thiosulphure and hydrochloric acid to form sulphur.

Prediction

  If the temperature of sodium thiosulphate is higher, the rate of sulphur formed will be faster, that mean the time of reaction will be shorter. On the opposite side, if the temperature of the sodium thiosulphateis lower, the rate of sulphur form will be slower, that mean the reaction will be longer.

Scientific background

  The rate of reaction always affect by the temperature, concentration of the solution and the subdivision.

Temperature:

If the temperature is higher, it will be reacts faster. Because higher temperature give more energy to the particles and let them have more frequent collision. It cause they move more quickly.

The other reason is they can get more energy from high temperature to break down the chemical bonds. As the result, more of the collisions will produce more products, so the rate of reaction will be faster

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Concentration of the solution:

More concentrated solution will reacts faster, cause higher concentration solute particles make more frequent collisions

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The subdivision:

Smaller pieces will be reacts faster cause it has large surface area make they can have more collisions

Planning

 

In this experiment, we will only change the temperature of the solution to see how it affects the rate of the reaction. So this time, I will make the amount of sodium thiosulphate and acid be the same. And mix them together and measure the time of the reaction.

In the experiment, I will use the bench hydrochloric acid and a solution of sodium thiosulphate which is concentration is 8 ...

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