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Investigate how I can speed up the rate of reaction between sodium disulphate and hydrochloric acid.

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Introduction

INVESTIGATION I am going to investigate how I can speed up the rate of reaction between sodium disulphate and hydrochloric acid. Background Knowledge Temperature of Acid Concentration of Acid Surface Area Last year my class conducted experiments of the rates of reaction between marble chips and hydrochloric acid. (1) WEAK ACID In this experiment we had a beaker of weak acid and a beaker of strong acid of which both contained a chip of marble. The stronger acid made the marble chip react and dissolve faster because there are more acid particles to attack it. (2) In our second experiment we had two beakers of acid (of the same strength). I heated up one beaker of acid and left the other one. ...read more.

Middle

The following will remain the same; Colour/Size of X Temperature/Heat Equipment Equipment List For this experiment I used the following equipment: The equipment that I had to use for my investigation to find out how to speed up the rate of reactions between sodium thiosulphate and hydrochloric acid was: * 3 Beakers * 2 Measuring Cylinders * 1 Piece of white paper * 1 Stopwatch * 1 conical flask Procedures 1. I will put 10cms3 hydrochloric acid into a measuring cylinder. 2. I will then put 10cms3 sodium thiosulphate into a measuring cylinder. 3. I will then put hydrochloric acid into a beaker. 4. I will then place it on a white page with a black x. 5. I will add sodium thiosulphate. ...read more.

Conclusion

48.53 48.72 48.62 4 6 10 49.72 49.94 49.83 3 7 10 50.19 50.78 50.48 2 8 10 52.94 51.26 52.1 1 9 10 56.84 52.43 54.63 0 10 10 No Change No Change 0 CONCLUSION The graph shows that the stronger the acid the quicker the reaction. The line on the graph goes down showing the time goes down with a stronger acid. This shows that my prediction is right. The stronger the acid the quicker the reaction is. This stronger the acid the quicker the reaction is. This is because there are more particles in a stronger acid than a weaker acid, so they have more a chance of reaction with the particles in the sodium thiosulphate. IMPROVEMENTS I think I could improve the experiment by using a burette to measure out the acid and water more accurately. ...read more.

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