The Rates of Reaction Between HCl and Na2S2O3.

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The Rates of Reaction Between HCl and Na2S2O3

 Introduction

 This is an experiment to explore the rate of reaction when HCl (Hydrochloric Acid) reacts with

Na2S2O3 (Sodium Thiosulphate). Also to find the rates of reaction I am going to dilute the HCl

to test the particle collision theory.

 Equipment List

        Safety Glasses

        A pipette

        A conical flask

        2 x measuring cylinders

        Bottle of Na2S2O3

        Bottle of HCl

        Stop clock

        Piece of white paper with black cross

 Safety

 To ensure safety in this experiment I follow these rules:

        

        Always wear safety glasses

        Stand at all times

        Report any spills imediately

        Follow basic lab safety rules

        Work tidily

        Be sensible with equipment

 Method

 This experiment is not a hard one to set up or carry out. Firstly, I will place the conical glass on

the piece of paper, making sure that the glass is clean so I can see the cross clearly to start with.

Then I will measure out 25cm³ of Na2S2O3 using one of the measuring cylinders. I will then

pour it into the conical flask, making sure not spill any as I do it. I will then wash out that

measuring cylinder and fill it with 5cm³ of H20. I can then pour it into the Na2S2O3 without the

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fear of it reacting. The water molecules get in between the Na2S2O3 particles and spread them

out but do not react with them. Then I will use the other measuring tube to measure 5cm³ of

HCl. Once it is measured, I will pour it into the conical flask. As soon as the HCl touches the

sodium thiosulphate I will press the start button on the stop clock. When the sodium

thiosulphate and hydrochloric acid have fully reacted the solution will have turned too a colour

that makes me unabe to see the black cross. As ...

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